Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
Choose the word or phrase that best fits the blank space in each sentence. 1. If you go__doing that and you'll end______in serious trouble.
a. up/ with b. on/ up c. off /with
2. They are trying to save the animals_______ extinction.
c. from a. on d. for b.to
3. They didn't see each other again _________the fall.
c. from a. since b. in d.unit
4._________ air is one of the many problems we have to solve.
a. Pure b. Polluted c. Dust d. Pleasant
5. I'm disappointed ___________people have spoiled this area
. a. that b.when c.if d.with
6. We couldn't go on a picnic as planned ___________it was raining hard
b. but a. although c. because d.so
7. We can eat at home or, ____________you prefer, we can go to a restaurant.
b. whether a. when c. if d. unless
8. Because plastic bags are very hard to_______. They will cause pollution.
a. dissolve c.tear d. collect b. wrap
9. These materials can be_______ into other packaging products.
d. recycled a. reused b.reduced c. removed
10. Crops are sprayed with_________ to kill insects
a. fertilizer. b. manune c. dung d. pesticede
![](https://rs.olm.vn/images/avt/0.png?1311)
I. Read the following passage and choose the best answer.
Before the invention of plastic: Before plastic, the only materials that could be molded into different shapes were clay and glass. However, both of these materials are heavy and break easily. This is why plastic was a big improvement.
Today, plastic is used in almost everything, from shopping bags and bottles to chairs and cars. Plastic has conquered the world. But do you know how it was first made?
1862 - Parkesine
The first man-made plastic was created by Alexander Parkes, who introduced it at the 1862 Great International Exhibition in London. It was called Parkesine, and it was made from plant materials. Once heated, it could be molded, and it held its shape when cooled. Also, it could be made colored or transparent. However, it was too expensive to produce for common use.
1866 - Celluloid
In the 19th century, billiards was so popular that a lot of elephants were being killed for their ivory, which was used to make billiard balls. So, people tried to find a substitute. A U.S. billiard ball company offered a prize of $10,000 to the person who could design the best substitute for natural ivory. In 1866, John Wesley Hyatt created Celluloid while trying to win the prize. Although he failed to win, Celluloid was later used to make many products, including false teeth, piano keys, and ping pong balls.
1909 - Bakelite
Leo Baekeland created Bakelite in 1909. Made entirely of artificial materials, it was the first true plastic. It was inexpensive, and it kept its shape when heated. Soon, it was being used in many things, including electrical products and jewelry. Since then, many other plastics have been developed.
Today - Petroleum
Today, most plastics are produced from non-natural materials made from petroleum. They are light, flexible, strong, and cheap. Despite all these advantages, there is one problem: plastic waste breaks down slowly and toxic chemicals can leak from it. Therefore, people are trying to develop less harmful plastics.
1. What is the main idea of this passage?
A. Plastic is harmful to many plants and crops.
B. New materials are currently being created to replace plastic.
C. Plastic was originally invented as a substitute for petroleum.
D. Plastic has been developed and improved over a long period of time.
2. Which item was NOT made with Celluloid?
A. ping pong balls B. billiard balls C. false teeth D. piano keys
3. Which was an advantage of Bakelite?
A. It broke down very slowly. B. It didn’t contain any chemicals.
C. It could be used to store petroleum. D. It could be heated without changing shape.
4. What can be inferred about Parkesine?
A. It wasn’t as strong as ivory. B. It could not be seen through.
C. It cost more to make than Bakelite. D. It was named after a billiard ball company.
5. Which can replace the word “produce” in line 8?
A. discover B. analyze B. introduce D. manufacture
![](https://rs.olm.vn/images/avt/0.png?1311)
1. If you go ___ doing that and you'll end ____ in serious trouble.
A.on - with. B.on - up. C.off - with. D.out - up
2. They arr trying to save the animals ____ extinction.
A.on. B.to. C.from. D.for
3. They didn't see each other again ___ the fall.
A.since. B.in. C.from. D.until
4.____ari is one of the many problems we have to solve
A.pure. B.polluted. C.fresh. D.pleasant
5. People have ___ this beach with a lot of trash
A.spoiled. B.cleaned. C.collected. D.pleasant
6. He got a ____ for parking on douple yellow lines.
A.fee. B.ticket. C.fine. D.token
7. By sticking labels over the address you can ___envelopes
A.recycle. B.reduce. C.reuse. D.return
8. Because placstic bags are very hard to ____, they will cause pollution.
A.dissolve. B.wrap. C.tear. D.collect
9. These materials can be ___into other packaging products.
A.reused. B.reduced. C.removed. D.recycled
10. Crops are sprayed with ___ to kill insects.
A. Fertilizer. B.manune. C.dung. D.pesticide
11. If people ___ public transport, there will be less pollution.
A.use. B.will use. C.can use. D.used
12. ___we miss the last bus , we will have to walk home
A.as. B.when. C.if. D.unless
![](https://rs.olm.vn/images/avt/0.png?1311)
1. ... Air is one of the many problems we have to solve.
A. Pollute
B. Polluted
C. Polluting
D. Pollution
2. If you want to save money, you should ... the amount of water your family uses.
A. Increase
B. Reuse
C. Reduce
D. Repair
3. These materials can be ... into another packaging products.
A. Recycled
B. Reduced
C. Reused
D. Removed
4. Crops are sprayed with ... to kill insects.
A. Fertilizer
B. Pesticide
C. Water
D. Dynamite
5. Because plastic bags are very hard to ... they will cause pollution.
A. Wrap
B. Collect
C. Litter
D. Dissolve
6. What are you looking ... ? - My picture book. I've lost it.
A. On
B. Off
C. After
D. For
7. The roof ... under the weight of snow last night. (??)
A. Hurricane
B. Earthquake
8. We are going to ... the anniversary for our 50th wedding.
A. To celebrate
B. Celebrated
C. Celebrating
D. Celebrate
![](https://rs.olm.vn/images/avt/0.png?1311)
Read the passage and fill in each blank with the correct form of the verbs from the box.
brought however shaping materials works imported blow performing fear representing
Marble Mountains is a group of five smaller mountains (1) representing Metal, Wood, Water, Fire and Earth. It is also a travel itinerary linking Da Nang City to the ancient town of Hoi An and Hue City. As the name suggests the Marble Mountains used to be a place providing input (2)materials for craftsmen in the village, but the local government banned marble exploitation(3)for fear that the five mountains could disappear.Most of the marble for the village now comes from northern provinces such as Ninh Binh, Thanh Hoa and Thai Nguyen. As a further step to diversify products, the marble fine arts village has (4) imported marble from Pakistan.As far as I know, the man who (5)brought marble craftsmanship to the region came from Thanh Hoa, and most craftsmen in the village had handed down the craft from generation to generation. There are some 3,000 handicraft workers in Non Nuoc village. (6) However , there are only 70 skillful craftsmen who can (7)blow souls into marble sculptures after other workers have finished (8)shaping the Products.In the shops along the highway, you can see different marble products in all shapes and sizes,from contemporary (9) works to religious sculptures. And of course you will have a chance to see craftsmen (10)performing their art and turning soulless marble into sophisticated sculpture products.
![](https://rs.olm.vn/images/avt/0.png?1311)
1. ... Air is one of the many problems we have to solve.
A. Pollute
B. Polluted
C. Polluting
D. Pollution
2. If you want to save money, you should ... the amount of water your family uses.
A. Increase
B. Reuse
C. Reduce
D. Repair
3. These materials can be ... into another packaging products.
A. Recycled
B. Reduced
C. Reused
D. Removed
4. Crops are sprayed with ... to kill insects.
A. Fertilizer
B. Pesticide
C. Water
D. Dynamite
5. Because plastic bags are very hard to ... they will cause pollution.
A. Wrap
B. Collect
C. Litter
D. Dissolve
6. What are you looking ... ? - My picture book. I've lost it.
A. On
B. Off
C. After
D. For
7. The roof ... under the weight of snow last night.
A. Hurricane
B. Earthquake
8. We are going to ... the anniversary for our 50th wedding.
A. To celebrate
B. Celebrated
C. Celebrating
D. Celebrate
These materials can be recycled into other packaging products.
These materials can be recycled.into other packaging products.