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II. Fill in the blank of the following passage with ONE suitable word. Write your answer on your answer sheet.

There is much more water than land (1)___________ the surface of the earth. The sea and oceans (2)_____________ nearly four-fifths of the whole world, and only one-fifth of (3)__________ land. If you traveled over the earth (4)______ ________different directions, you would have to spend much more of your time (5)________________ on water than on roads or railways. We sometimes forget that (6)_______________ every mile of land there is four miles of water.

There is much water on the surface of our earth that we (7)______________ to use two words to describe. We use the word seas to (8)______________ those parts of water surface which (9)______________ only a few hundreds of miles wide, the word oceans to describe the huge areas of water which are thousands of miles wide (10)__________ very deep.

III. Read the following passage carefully and choose the best answer to each question. Identify your answer by writing the corresponding letter A, B, C or D on your answer sheet.

One of the most urgent environmental problems in the world today is the shortage of clean water. Having clean drinking water is basic human right. But acid rain, industrial pollution and garbage have made many sources of water undrinkable. Lakes, reservoirs and even entire seas have become vast pools of poison. Lake Baikal in Russia is one of the largest lakes in the world. It contains a rich variety of animals and plants, including 1,300 rare species that do not exist anywhere else in the world. But they are being destroyed by the massive volumes of industrial effluent which pours into the lake everyday. Even where law existed, the government did not have the power to enforce them. Most industries simply ignore the regulations. The Mediterranean Sea occupies 1% of the world’s water surface. But it is the dumping ground for 50% of all marine pollution. Almost 16 countries regularly throw industrial wastes a few miles off shore.

Water is free to everyone. A few years ago people thought that the supply of clean water in the world was limitless. Today, many water supplies have been ruined by pollution and sewage. Clean water is now scarce, and we are at last beginning to respect this precious source. We should do something now.

1. According to the writer, one environmental problem in the world today is ________ .

A. acid rain B. industrial pollution. C. safe water shortage. D. population explosion .

2. Many sources of water are not drinkable because of _______ .

A. acid rain. B. industrial pollution. C. garbage D. all A, B, C, are correct

3. What is serious problem of Lake Baikal in Russia?

A. It contains a rich variety of animals and plants.

B. It is polluted by massive volumes of industrial wastes discharged into it .

C. It has 1,300 rare species that do not exist anywhere else in the world .

D. The government did not have the power to enforce laws and regulations.

4. How many countries throw industrial waste into the Mediterranean Sea regularly?

A. nearly 16 B. exactly 16. C. exactly 15 D. less than 15.

5. What is the message to the reader?

A. We should take action to protect our water resources.

B. We should take all water resources into account.

C. We should limit the use of water resources.

D. We should encourage people to use safe water.

1
28 tháng 12 2017

II. Fill in the blank of the following passage with ONE suitable word. Write your answer on your answer sheet.

There is much more water than land (1)____on_______ the surface of the earth. The sea and oceans (2)_____are________ nearly four-fifths of the whole world, and only one-fifth of (3)___surface _______ land. If you traveled over the earth (4)____in_____different directions, you would have to spend much more of your time (5)______travelling__________ on water than on roads or railways. We sometimes forget that (6)______each_________ every mile of land there is four miles of water.

There is much water on the surface of our earth that we (7)______have________ to use two words to describe. We use the word seas to (8)____describle __________ those parts of water surface which (9)_______are _______ only a few hundreds of miles wide, the word oceans to describe the huge areas of water which are thousands of miles wide (10)_____and_____ very deep.

III. Read the following passage carefully and choose the best answer to each question. Identify your answer by writing the corresponding letter A, B, C or D on your answer sheet.

One of the most urgent environmental problems in the world today is the shortage of clean water. Having clean drinking water is basic human right. But acid rain, industrial pollution and garbage have made many sources of water undrinkable. Lakes, reservoirs and even entire seas have become vast pools of poison. Lake Baikal in Russia is one of the largest lakes in the world. It contains a rich variety of animals and plants, including 1,300 rare species that do not exist anywhere else in the world. But they are being destroyed by the massive volumes of industrial effluent which pours into the lake everyday. Even where law existed, the government did not have the power to enforce them. Most industries simply ignore the regulations. The Mediterranean Sea occupies 1% of the world’s water surface. But it is the dumping ground for 50% of all marine pollution. Almost 16 countries regularly throw industrial wastes a few miles off shore.

Water is free to everyone. A few years ago people thought that the supply of clean water in the world was limitless. Today, many water supplies have been ruined by pollution and sewage. Clean water is now scarce, and we are at last beginning to respect this precious source. We should do something now.

1. According to the writer, one environmental problem in the world today is ________ .

A. acid rain B. industrial pollution. C. safe water shortage. D. population explosion .

2. Many sources of water are not drinkable because of _______ .

A. acid rain. B. industrial pollution. C. garbage D. all A, B, C, are correct

3. What is serious problem of Lake Baikal in Russia?

A. It contains a rich variety of animals and plants.

B. It is polluted by massive volumes of industrial wastes discharged into it .

C. It has 1,300 rare species that do not exist anywhere else in the world .

D. The government did not have the power to enforce laws and regulations.

4. How many countries throw industrial waste into the Mediterranean Sea regularly?

A. nearly 16 B. exactly 16. C. exactly 15 D. less than 15.

5. What is the message to the reader?

A. We should take action to protect our water resources.

B. We should take all water resources into account.

C. We should limit the use of water resources.

D. We should encourage people to use safe water.

17 tháng 1 2018

1.on

2.cover

3.the

4.in

5.moving

6.for

7.have

8.describle

9.is

10 .and

17 tháng 1 2018

I fill in the blank of the following passage with one suitable word.Write your answer on your answer sheet

there is much more water than land..ON.......the surface of the earth .The sea and oceans.....COVER....nearly four-fifths of the whole world , and only one-fifths of the whole world and only one fifth of....THE....... land. If you traveled over the earth .....IN....different directions you would have to spend much more of your time.......MOVING.....on water than on roads or railways .We sometimes forget that......FOR....every mile of land there is four miles of water

there is much water on the surface of our earth that we ..HAVE.......to use two words to describe. We use the word seas to...DESCRIBE..... those parts of water surface which...IS........ only a few hundreds of milea wide the word oceans to describe the huge ares of water which are thousands of miles wide.....AND.....very deep

There’s much more water than land on the (1) ___ of the earth. The seas and oceans cover nearly (2) ___ of the whole world, and only one-fifth of (3) ___ land. If you traveled over the earth in different directions, you would have to spend (4) ___ more of your time (5) ___ on water that on roads or railways. We sometimes forget that for every mile of land (6) ___ four miles of water. There’s so much water in the surface of our earth that we (7) ___ to use two words to describe. We use the word...
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There’s much more water than land on the (1) ___ of the earth. The seas and oceans cover nearly (2) ___ of the whole world, and only one-fifth of (3) ___ land. If you traveled over the earth in different directions, you would have to spend (4) ___ more of your time (5) ___ on water that on roads or railways. We sometimes forget that for every mile of land (6) ___ four miles of water.

There’s so much water in the surface of our earth that we (7) ___ to use two words to describe. We use the word SEAS (8) ___ those parts of water surface which (9) ___ only few hundreds of mile, the word OCEANS to describe the huge area of water (10) ___ are thousands of miles wide and very deep.

1. A. cover B. surface C. outer D. outside

2. A. four-fives B. four-fifth C. four fifths D. fourth-fifths

3. A. it is B. it’s C. its D. them are

4. A. many B. much C. few D. too

5. A. to move B. move C. moved D. moving

6. A. there are B. there is C. there has D. have

7. A. must B. should C. have D. would

8. A. describing B. describes C. describe D. to describe

9. A. is B. are C. has D. will be

10. A. that’s B. which C. where D. whose

2
21 tháng 6 2017

There’s much more water than land on the (1) _surface__ of the earth. The seas and oceans cover nearly (2) _four-fifths__ of the whole world, and only one-fifth of (3) _its__ land. If you traveled over the earth in different directions, you would have to spend (4) __much_ more of your time (5) _moving__ on water that on roads or railways. We sometimes forget that for every mile of land (6) _there are__ four miles of water.

There’s so much water in the surface of our earth that we (7) __have_ to use two words to describe. We use the word SEAS (8) _describes__ those parts of water surface which (9) _is__ only few hundreds of mile, the word OCEANS to describe the huge area of water (10) _which__ are thousands of miles wide and very deep.

1. A. cover B. surface C. outer D. outside

2. A. four-fives B. four-fifth C. four fifths D. fourth-fifths

3. A. it is B. it’s C. its D. them are

4. A. many B. much C. few D. too

5. A. to move B. move C. moved D. moving

6. A. there are B. there is C. there has D. have

7. A. must B. should C. have D. would

8. A. describing B. describes C. describe D. to describe

9. A. is B. are C. has D. will be

10. A. that’s B. which C. where D. whose

21 tháng 6 2017

There’s much more water than land on the (1) ___ of the earth. The seas and oceans cover nearly (2) ___ of the whole world, and only one-fifth of (3) ___ land. If you traveled over the earth in different directions, you would have to spend (4) ___ more of your time (5) ___ on water that on roads or railways. We sometimes forget that for every mile of land (6) ___ four miles of water.

There’s so much water in the surface of our earth that we (7) ___ to use two words to describe. We use the word SEAS (8) ___ those parts of water surface which (9) ___ only few hundreds of mile, the word OCEANS to describe the huge area of water (10) ___ are thousands of miles wide and very deep.

1. A. cover B. surface C. outer D. outside

2. A. four-fives B. four-fifth C. four fifths D. fourth-fifths

3. A. it is B. it’s C. its D. them are

4. A. many B. much C. few D. too

5. A. to move B. move C. moved D. moving

6. A. there are B. there is C. there has D. have

7. A. must B. should C. have D. would

8. A. describing B. describes C. describe D. to describe

9. A. is B. are C. has D. will be

10. A. that’s B. which C. where D. whose

VOCABULARY AND GRAMMAR I. Match a word in column A with its description in column B, writing the answer in each blank. Answer A B ______ 1. A thunderstorm A. It is created when the surface layer of the ground collapses. It varies in size and are found all over the world. It is an area of ground that has no natural external surface drainage. When it rains, all of the water stays inside it and typically drains into the subsurface. It can vary from a few feet to hundreds of acres and from less...
Đọc tiếp

VOCABULARY AND GRAMMAR I. Match a word in column A with its description in column B, writing the answer in each blank. Answer A B ______ 1. A thunderstorm A. It is created when the surface layer of the ground collapses. It varies in size and are found all over the world. It is an area of ground that has no natural external surface drainage. When it rains, all of the water stays inside it and typically drains into the subsurface. It can vary from a few feet to hundreds of acres and from less than 1 to more than 100 feet deep. ______ 2. A tornado B. The Earth has a crust under the oceans and the land that we live on. This crust made of massive areas of flat rock called tectonic plates, which float on the Earth’s mantle, the inside layer of the Earth. When the plates move slowly together, this movement forces energy through the crusts to the Earth’s surface. The energy causes the Earth to tremble and shake. ______ 3. A hurricane C. It is a very bright flash of electricity that happens in a thunderstorm. It is actually a spark that crosses the gap between two clouds or between a cloud and the Earth. It carries an enormous charge of electricity. Trees are burned, metal can be melted and people can be killed. ______ 4. An earthquake D. It is caused by earthquakes at sea. It forms when energy from an earthquake displace hundreds of cubic kilometers of water from the seabed. Large waves begin moving through the ocean from their epicenters. When it reaches shallow water near coastal areas, it increases in height. The sign comes before it strikes when the waterline suddenly retreats, exposing hundreds of meters of beach and seabed. ______ 5. A volcano E. It is a very violent windstorm. The air is concentrated and whirls up rapidly. It is grey in colour and looks like an elephant’s trunk swaying down from the clouds to touch the ground with its tip. ______ 6. A tsunami F. It is a hill or mountain formed when molten material or lave from the inside of the Earth is forced through the Earth’s crust by gases. It can produce vast clouds of very fine volcanic dust which looks like smoke. ______ 7. A sinkhole G. It is a storm where you hear thunder and see lightning. There is usually heavy rain. It is an electric storm. ______ 8. Lightning H. It is the most violent storm known on Earth. It is a tropical storm. It forms at sea and causes dangerous, stormy seas. It can reach the land and destroy buildings and trees. It can blow high waves onto the land and cause flooding. II. Complete each sentences with the correct word from the box. drought flood hurricane landslide tornado 1. When there is a ___________, a lot of water covers an area where there usually isn’t water. 2. A ___________ refers to a long time without rain. 3. When there is a ______________, a lot of rocks and earth fall down a hill. 4. A____________ is a storm with a lot of wind that moves over water. 5. A____________ is a storm in which the air moves very quickly in a circle. III. Use the verbs in the box in the correct form to complete the sentences. bury evacuate rage take recover scatter provide suffer 1. The government _____________ health and other services to the affected regions. 2. Action were _____________ to limit the effects of the floods in Quang Ninh. 3. The Red Cross helped homeless families to ____________ from the disaster through the project. 4. The majority of concerned areas have ___________ from cholera epidemics after the floods and landslides in Central America. 5. Early September, mudslides caused by heavy rains _____________ an entire village of 480 inhabitants. 6. Thousands of villagers ____________ from flood-prone areas after the warnings from the weather bureau. 7. Tiny particles of dust, smoke, salt or pollution droplets that ___________ through the air to cause haze. 8. The fires ____________ for more than a week in the southern region of Chile, which has been hit by a severe drought. MONG MỌI NGƯỜI GIÚP ĐỠ

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Fill one suitable word in each space of the following passage About two hunderd years ago man lived in great harmony with his environment......(1)........industry was not much developed. Today the situation is quite different.People all over the world are worried about......(2)......is happening to the enviroment, because od modern industry and the need for more and more energy. Newspaper and magazines write about water pollution, air pollution and land pollution. Why is.......(3)......so...
Đọc tiếp

Fill one suitable word in each space of the following passage

About two hunderd years ago man lived in great harmony with his environment......(1)........industry was not much developed. Today the situation is quite different.People all over the world are worried about......(2)......is happening to the enviroment, because od modern industry and the need for more and more energy. Newspaper and magazines write about water pollution, air pollution and land pollution.

Why is.......(3)......so much discussion about pollution ? After all, people have been .......(4)....... the world around them for thousands of years. But in the past, there were not many people and lots of room in the world so they could move to another place when their sattlements became ......(5).....

Now, however, many parts os the world are crowded, people live in big cities and much of our waste, especially waste from factories, electric power stations, the chemical industry and heavy industry is very dangerous. Much of this dangerous waste goes into the air and is carried by the ......(6)....... for great distance.

The earth is our home. We must take care of it, for ourselves and for the........(7)...... generations. This means keeping our environment clean. Ecologists, the scientists who study the relation between living ......(8).....and the environment point out the importance of this task. However, each of us must do everythingpossible to keep the land, air and water clean.

1
20 tháng 1 2019

Fill one suitable word in each space of the following passage

About two hunderd years ago man lived in great harmony with his environment......(1)while........industry was not much developed. Today the situation is quite different.People all over the world are worried about......(2)what......is happening to the enviroment, because od modern industry and the need for more and more energy. Newspaper and magazines write about water pollution, air pollution and land pollution.

Why is.......(3)there......so much discussion about pollution ? After all, people have been .......(4)polluting....... the world around them for thousands of years. But in the past, there were not many people and lots of room in the world so they could move to another place when their sattlements became ......(5)dirty.....

Now, however, many parts os the world are crowded, people live in big cities and much of our waste, especially waste from factories, electric power stations, the chemical industry and heavy industry is very dangerous. Much of this dangerous waste goes into the air and is carried by the ......(6)....... for great distance.

The earth is our home. We must take care of it, for ourselves and for the........(7)next...... generations. This means keeping our environment clean. Ecologists, the scientists who study the relation between living ......(8)objects.....and the environment point out the importance of this task. However, each of us must do everythingpossible to keep the land, air and water clean.

20 tháng 1 2019

Cảm ơn câu trả lời của bạn !

I. Fill in the blank with the correct form of the word 1. What is the correct .............. of this word (pronounce) 2. Last week we have an ........... summer holiday ( enjoy) 3. The ............ of the project made me tense ( important) 4. You had better do some........... for the final exam ( revise) 5. ....................., her illness was more serious than we thought ( fortunate) II. Fill in each gap with a suitable word to complete th following passage Rivers are one of the...
Đọc tiếp

I. Fill in the blank with the correct form of the word

1. What is the correct .............. of this word (pronounce)

2. Last week we have an ........... summer holiday ( enjoy)

3. The ............ of the project made me tense ( important)

4. You had better do some........... for the final exam ( revise)

5. ....................., her illness was more serious than we thought ( fortunate)

II. Fill in each gap with a suitable word to complete th following passage

Rivers are one of the world's most important natural resources . Many cities are on the large rivers, and (1)......... every country has a least one river that (2)............. an important part in the lives of its people . Beside transportation, rivers (3).......... water for crops, water to drink , and re creation for people who live along their (4).............. And in (5)............ to get water for crops , engineers sometimes build a dam (6) a river and let water become a lake behind the dam . Then people can use their water not (7)........ irrigate fields but also to make eletricity for homes and industries. (8)........ the water often becomes polluted when cities river bank grow (9) ............ and the number of industries increases. We are learning that it is necessary to (10) ....... rivers clean if we want to enjoy the benefits of the natural resources.

1
17 tháng 11 2017

I. Fill in the blank with the correct form of the word

1. What is the correct pronunciation of this word (pronounce)

2. Last week we have an enjoyable summer holiday ( enjoy)

3. The importance​ of the project made me tense ( important)

4. You had better do some revision for the final exam ( revise)

5. Unfortunately, her illness was more serious than we thought ( fortunate)

II. Fill in each gap with a suitable word to complete th following passage

Rivers are one of the world's most important natural resources . Many cities are on the large rivers, and (1) almost every country has a least one river that (2) plays an important part in the lives of its people . Beside transportation, rivers (3) provide water for crops, water to drink , and re creation for people who live along their (4) banks And in (5) order to get water for crops , engineers sometimes build a dam (6)across a river and let water become a lake behind the dam . Then people can use their water not (7) Only irrigate fields but also to make eletricity for homes and industries. (8) However the water often becomes polluted when cities river bank grow (9) in size and the number of industries increases. We are learning that it is necessary to (10) keep rivers clean if we want to enjoy the benefits of the natural resources.

X. Read the passage carefully and do the tasks. There are many kinds of pollution. Air, water, and land can be polluted. Some pollution is caused by nature, such as foods, forest fires, and volcanoes. People are the major Cause of pollution. We pollute the air with our cars, homes, and factories. Smoke from factories and car exhaust makes the air looks gray and smoggy. Some people cannot go outside when the air is very bad! We pollute the water by dumping garbage and Chemicals in the water....
Đọc tiếp

X. Read the passage carefully and do the tasks.
There are many kinds of pollution. Air, water, and land can be polluted. Some pollution is caused by
nature, such as foods, forest fires, and volcanoes. People are the major Cause of pollution. We pollute the
air with our cars, homes, and factories. Smoke from factories and car exhaust makes the air looks gray and
smoggy. Some people cannot go outside when the air is very bad! We pollute the water by dumping
garbage and Chemicals in the water. Plants and animals die because of the pollution in the water. We
pollute the soil with Chemicals and garbage. We harm the land by cutting down trees in the forest,
especially to build roads and new houses without careful planning and thinking.
The only way to save our environment is to think about pollution. How can you stop or limit pollution?
How do we protect our environment? Conservation is one way to protect our environment. Conservation is
the wise use and protection of our environment. We can control water pollution by not producing as much
as waste and by proper disposal of sewage and garbage. We can take care of recreation land by cleaning up,
after ourselves and not causing more pollution. Carpooling and public transportation will help reduce air
pollution.
Recycling is a type of conservation. Recycling is reusing items over again or in a new way. Recycling can
help us conserve our natural resources so they will last many more years. A. Find the word in bold in the
passage that means:
1. the protection of the natural environment ____
2. have a bad effect on something ____
3. a large amount of water covering an, area that usually dry ____
4. sharing a car ride with other people ____
5. waste gases that come out of an engine ____
6. the process of making air, water, soil, etc. dirty ____
7. get rid of ____
B. Choose the correct answers.
1. According to the passage, pollution________
A. is always caused by humans. B. can only be caused by nature.
C. is mainly caused by humans. D. may sometimes cause natural disasters.
2. What kind of pollution may a car cause?
A. Air pollution B. Water pollution C. Soil pollution D. Light pollution
3. Which of the followings is not an example of soil pollution?
A. Land development B. Waste disposal
C. Pesticide or fertilizer use D. Exhaust from traffic
4. How can we help save our environment?
A. Stop pollution. B. Dump garbage into the river.
C. Drive cars everywhere. D. Cut down trees in the forests.
5. How does recycling help the environment?
A. It expands landfills. B. It saves natural resources.
C. It increases water pollution. D. It causes air pollution.

6. What can we do to help reduce air pollution?
A. Walk or bike B. Carpool to work or school
C. Use public transport D. All of the above
7. What is the main idea of this article?
A.The air is dirty because of cars and factories. B. The soil gets polluted from littering.
C.People cause pollution, but they can also stop or limit it.
D. Conservation is the only way to stop environmental pollution.

1
7 tháng 3 2021

1-c;2-a;3-d;4-a;5-b;6-d;7-c

18 tháng 7 2018

Fill in each numbered blank with ONE suitable word to complete the passage.

When you hear the word " bank ", what do you think of ? A ....place...(1) to put money ? The land on the edge of a river ? To depend on something or someone ? If you choose any of .....these...(2) things, you are right. Why ? Because words often have ....more....(3) than one meaning. The tricky part is figuring out .....which...(4) meaning is appropriate. Choosing the correct meaning of a word depends on ...two....(5) things. First, it depends on the words and ...sentences....(6) surrounding your particular word. The other words and sentences give you context clues. ......secondly...(7), the meaning depends on how the words is .......used....(8) in the sentence. It is a noun, a verb, ....an....(9) adjective or part of a phrase ? Knowing the word's part of speech will ....help...(10) discover the word's precise meaning.

18 tháng 7 2018

(1) place

(2) these

(3) more

(4) which

(5) two

(6) sentences

(7) Second

(8) used

(9) an

(10) help

E. WRITING 1. Reorder the words to make full sentences. 1. of bodies/ directly/ Air pollution/ contaminate/ can/ of water and soil/ the surf2. trees/ so much/ don't/ We/ if/ we/ waste/ will/ thousands of/ paper/ save.3. would/bad/ air pollution/ What/ got/ you/ really/ do/ if?4. as/ the death/ Polluted water/ animals/ of/ fish and crabs/ such/ aquatic/ causes5. went/ more/ less/ to/ If/ we/ recycled/ rubbish/ landfill sites.6. the overuse/ has/ Agriculture/ on/ an/ land pollution/ impact/ of/...
Đọc tiếp

E. WRITING 1. Reorder the words to make full sentences

. 1. of bodies/ directly/ Air pollution/ contaminate/ can/ of water and soil/ the surf

2. trees/ so much/ don't/ We/ if/ we/ waste/ will/ thousands of/ paper/ save.

3. would/bad/ air pollution/ What/ got/ you/ really/ do/ if?

4. as/ the death/ Polluted water/ animals/ of/ fish and crabs/ such/ aquatic/ causes

5. went/ more/ less/ to/ If/ we/ recycled/ rubbish/ landfill sites.

6. the overuse/ has/ Agriculture/ on/ an/ land pollution/ impact/ of/ chemicals/ due t

7. much/ cities/ lights/ use/ Too/ of/ cause/ in/ may/ light pollution/ electric

8. our time/ is/ one/ most/ of/ problems/ serious/ Water pollution/ the/ of/ environmenia

II. Complete the second sentence so that it has the same meaning to the first one.

1. I think you should use energy efficient light bulbs. If I

2. He produced a great idea for our environmental project.

giúp mình với ạ , mình cần gấp

mình cảm ơn

1
8 tháng 4 2020

Ex1 : 

1.Air pollution can contaminate directly of bodies water and soil of  the surface 

2.We will waste so much paper if we don't save thousands of trees .

3.What đo you really got if air pollution would be bad ?

4. Polluted water causes sach as the death of fish and crab ,aqua,animals . 

5. If we recycle more rubbish ,it went to less landfill sites .

6.Agriculture has been impacted due to the overuse of chemicals on land pollution

7.Too much light is used in cities may cause of light pollution electric 

8. Water pollution is one of the most serious enviroment problems of our time

Unlike buried treasure and some minerals, fossils are usually not valuable in themselves. However, most of the fossils you find will be of greatest value to you. They will help you learn much about the geologic history of the earth and its inhabitants. If it were not for fossils, we would have no way of knowing about the animals that once roamed the earth or that once crawled on the bottom of the ancient seas. In fact, we would not even know for sure that there were once seas in some regions...
Đọc tiếp

Unlike buried treasure and some minerals, fossils are usually not valuable in themselves. However, most of the fossils you find will be of greatest value to you. They will help you learn much about the geologic history of the earth and its inhabitants.

If it were not for fossils, we would have no way of knowing about the animals that once roamed the earth or that once crawled on the bottom of the ancient seas. In fact, we would not even know for sure that there were once seas in some regions if it were not for the many fossils of sea animals that we find there.

You can look at some fossils and see for yourself the shape of the ancient animals. Even if you collect only bits of one kind of fossil, you may still be able to tell what it looked like. Making sense out of fossil bits is a little like working a jigsaw puzzle. Sometimes you will lose pieces, but you can still recognize the picture and even use your imagination to fill in missing details. The habits of ancient sea animals are not so easy to determine. Therefore, scientists study the structure and the habits of similar living animals to learn what the ancient ones must have been like. There are some things, however, that neither the study of fossils nor the study of living animals can tell us. For example, no one knows what colour most ancient sea animals were. Also, since the soft parts disappeared soon after death, many details of their internal structure are unknown. So the pictures of ancient sea creatures (as well as dinosaurs!) are what scientists think the animals looked like. Reconstructing the life of an ancient sea animal on the basis of fossil evidence and the characteristics of similar living animals is a little like relying on circumstantial evidence in court.

1. This passage is mainly about animals that __________.

A. have very tough hides

B. once lived on the earth

C. inhabit the seas of today

D. are becoming extinct

2. With the help of fossils we can __________.

A. reconstruct life of the past

B. predict the future

C. explain the changes of the seasons

D. save some species of animals from extinction

3. Many details of ancient animals are lacking because __________.

A. many species have not been found

B. volcanic disasters have permanently buried many fossils

C.many fossils lie in deep water and cannot be recovered

D. soon after death the soft parts of the body decay

49. To “determine" in the passage is closest in meaning to __________.

A. come across

B. study

C. find out

D. imitate

50. This passage implies that a scientist's evaluation of the past is based on __________.

A. laboratory experiments with live animals

B. a few facts mixed with a lot of opinions

C. predictions made in the past and present

D. field studies of our society

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1 B. once lived on the earth

2 A. reconstruct life of the past

3 D. soon after death the soft parts of the body decay

4 C. find out

5 B. a few facts mixed with a lot of opinions