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19 tháng 2 2020

mk nhớ mk có trả lời rồi mà

19 tháng 2 2020

còn thiếu

23 tháng 6 2020

4. B) eating

Xin lỗi nha, đang định in đậm thì lỡ xóa câu B

23 tháng 6 2020

1)the dirt from vegaterbles can make you________

A)bored B)tired C) sick D)well

2)you must do your homework more ________in the future

A)careful B)care C)careless D)carefully

3) you should__________ early if you want to do morning exercise

A)get up B)getting up C)to get up D) to getting up

4)mai enjoy ________sea food with her parents

A)to eat B)eating C)eat D)to eating

Circle the word that has different strees from others

1.A)aquarium B)material

C)appointment D)temperature

2.A)adventure B)detective

C)cucumber D)invention

3.A)across B)common

C)simply D)brother

4.A)listen B)visit C)open

D)enjoy

 III. Choose the word that has the different stress from the others.      1.   A. adventure               B. advertisement         C. buffalo                     D. detective      2.   A. cavity                     B. unhealthy                C. personal                    D. shower      3.   A. music                      B. science                    C. teacher                     D. contain      4.   A. paddle                    B. invent                     C. display                     D....
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III. Choose the word that has the different stress from the others.

      1.   A. adventure               B. advertisement         C. buffalo                     D. detective

      2.   A. cavity                     B. unhealthy                C. personal                    D. shower

      3.   A. music                      B. science                    C. teacher                     D. contain

      4.   A. paddle                    B. invent                     C. display                     D. cartoon

      5.   A. information            B. direction                 C. tomato                      D. potato

IV. Choose the best one (A, B, C or D) to complete the sentence or replace the underlined word.

      1.   Today, subjects like music and arts are put into the school                in Viet Nam.

            A. curriculum              B. education                C. school year             D. subjects

      2.   Robert does not have               Peter does.

            A. money more than                                       B. as many money as

            C. more money as                                           D. as much money as

      3.   For many people, a good knowledge of music and arts is regarded as a                    for every student.

            A. in needs                  B. necessity                 C. necessary                D. need

      4.   Last year, Matt earned                         his brother.

            A. twice as much as                                        B. twice as many as

            C. twice more than                                          D. twice as more as

      5.   Arts are of great                       in education, especially for young children.

            A. unimportant                                                B. unimportance

            C. importantly                                                 D. importance

      6.   Classical music is not              as pop music.

            A. exciting                  B. more excited          C. as exciting              D. as excited

      7.   The test is not               difficult           it was last month.

            A. as - as                     B. so - as                     C. more - as           D. A & B are correct.

      8.   This year’s musical festival is not                   it was last year.

            A. different from        B. worse                      C. as good as               D. as well as

      9.   I never watch ballet, and my sister doesn’t                .

            A. either                      B. like that                  C. too                          D. so

      10. He works                      we do.

            A. harder                     B. as hard as                C. harder                     D. so hard as

      11. Teenagers in Viet Nam like K-pop, and they like Korean films                    .

            A. too                          B. either                      C. so                            D. however

      12. Marie is not                  intelligent                    her sister.

            A. more – as                B. so – so                    C.so – as                      D. the – of

      13. My brother’s taste in art is quite different                   mine.

            A. to                            B. from                        C. with                        D. as

      14. I don’t work so hard my                      father.

            A. so                            B. as                            C. than                        D. more

      15. You can see many interesting                          in that art gallery.

            A. portraits                  B. actors                      C. paints                      D. colors

1
16 tháng 10 2021

III. Choose the word that has the different stress from the others.

      1.   A. adventure               B. advertisement         C. buffalo                     D. detective

      2.   A. cavity                     B. unhealthy                C. personal                    D. shower

      3.   A. music                      B. science                    C. teacher                     D. contain

      4.   A. paddle                    B. invent                     C. display                     D. cartoon

      5.   A. information            B. direction                 C. tomato                      D. potato

IV. Choose the best one (A, B, C or D) to complete the sentence or replace the underlined word.

      1.   Today, subjects like music and arts are put into the school                in Viet Nam.

            A. curriculum              B. education                C. school year             D. subjects

      2.   Robert does not have               Peter does.

            A. money more than                                       B. as many money as

            C. more money as                                           D. as much money as

      3.   For many people, a good knowledge of music and arts is regarded as a                    for every student.

            A. in needs                  B. necessity                 C. necessary                D. need

      4.   Last year, Matt earned                         his brother.

            A. twice as much as                                        B. twice as many as

            C. twice more than                                          D. twice as more as

      5.   Arts are of great                       in education, especially for young children.

            A. unimportant                                                B. unimportance

            C. importantly                                                 D. importance

      6.   Classical music is not              as pop music.

            A. exciting                  B. more excited          C. as exciting              D. as excited

      7.   The test is not               difficult           it was last month.

            A. as - as                     B. so - as                     C. more - as           D. A & B are correct.

      8.   This year’s musical festival is not                   it was last year.

            A. different from        B. worse                      C. as good as               D. as well as

      9.   I never watch ballet, and my sister doesn’t                .

            A. either                      B. like that                  C. too                          D. so

      10. He works                      we do.

            A. harder                     B. as hard as                C. harder                     D. so hard as

      11. Teenagers in Viet Nam like K-pop, and they like Korean films                    .

            A. too                          B. either                      C. so                            D. however

      12. Marie is not                  intelligent                    her sister.

            A. more – as                B. so – so                    C.so – as                      D. the – of

      13. My brother’s taste in art is quite different                   mine.

            A. to                            B. from                        C. with                        D. as

      14. I don’t work so hard my                      father.

            A. so                            B. as                            C. than                        D. more

      15. You can see many interesting                          in that art gallery.

            A. portraits                  B. actors                      C. paints                      D. colors

A.PRONUNCIATION, VOCABULARY AND GRAMMARI. Choose the word that has the underlined part pronounced differently from the others (1.5m)1. A. hot                        B. hand                C. house               D. hour2.A. cavity                     B. strange             C. man                 D. catch3. A. asked                     B. missed             C. called               D. cooked4.  A. decided                 B. loved               C. wanted             D....
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A.PRONUNCIATION, VOCABULARY AND GRAMMAR

I. Choose the word that has the underlined part pronounced differently from the others (1.5m)

1. A. hot                        B. hand                C. house               D. hour

2.A. cavity                     B. strange             C. man                 D. catch

3. A. asked                     B. missed             C. called               D. cooked

4.  A. decided                 B. loved               C. wanted             D. started                      

5. A. famous                  B. nervous           C. loud                 D. serious

6. A. poster                    B. comb                C. sick note          D. stomachach

Gấp a !!!

7
28 tháng 2 2021

1 D

2 B

3 C

4 B

5 C

6 D

28 tháng 2 2021

A.PRONUNCIATION, VOCABULARY AND GRAMMAR

I. Choose the word that has the underlined part pronounced differently from the others (1.5m)

1. A. hot                        B. hand                C. house               D. hour

2.A. cavity                     B. strange             C. man                 D. catch

3. A. asked                     B. missed             C. called               D. cooked

4.  A. decided                 B. loved               C. wanted             D. started                      

5. A. famous                  B. nervous           C. loud                 D. serious

6. A. poster                    B. comb                C. sick note          D. stomachach

27 tháng 11 2021

1 C

2 B

3 C

4 A

I. Circle the best option (A, B, C or D) to complete the passage below: (1.0pt)Thirty years ago in Vietnam, very few people had TV sets. These TV owners were very (1)____________. After dinner, their neighbors (2)_____________both inside and outside their houses. Some watched through the windows. All evening, (3)____________ sat and watched the black and white programs. Times have changed. Today, many families have a TV set. They sit and watch (4) _____________ their own living rooms.1. A....
Đọc tiếp

I. Circle the best option (A, B, C or D) to complete the passage below: (1.0pt)

Thirty years ago in Vietnam, very few people had TV sets. These TV owners were very (1)____________. After dinner, their neighbors (2)_____________both inside and outside their houses. Some watched through the windows. All evening, (3)____________ sat and watched the black and white programs. Times have changed. Today, many families have a TV set. They sit and watch (4) _____________ their own living rooms.

1. A. important B. wonderful C. expensive D. popular

2. A. gathers B. gathered C. gather D. to gather

3. A. he B. she C. they D. I

4. A.in B. at C. on D. to

II. Read the passage carefully and then answer the questions: (2.0pts)

A French oceanographer, Jacques Cousteau (1910 - 1997), invented a deep-sea diving vessel in the early 1940s. In the vessel, he could explore the oceans of the world and study underwater life. Now we can explore the oceans using special TV cameras as well. We can learn more about the undersea world thanks to this invention.

Questions:

1. When was Jacques Cousteau born?

________________________________________________________________

2. How old was he when he died?

________________________________________________________________

3. What did he invent?

________________________________________________________________

4. Can we learn more about the undersea world thanks to Jacques Cousteau's invention?

________________________________________________________________

PART : VOCABULARY & GRAMMAR

I. Circle the word that has different stress from others: (0.5pt)

1. A. aquarium B. material C. appointment D. temperature

2. A. adventure B. detective C. cucumber D. invention

II. Circle the word whose underlined part is pronounced differently from others: (0.5pt)

1. A. helped B. rented C. talked D. watched

1. A. baseball B. ask C. participate D. basketball

III. Circle the word or phrase (A, B, C or D) that best completes each sentence: (1.5pt)

1. She smiled ___________ me in a friendly way when she saw me.

A. with B. to C. of D. at

2. We ___________ our grandparents next week.

A. visit B. will visit C. visited D. to visit

3. How ___________ is the blue hat? It's 50,000 dong.

A. far B. many C. old D. much

4. What about ___________to school every morning?

A. going B. go C. to go D. went

5. The nurse __________ Lan's temperature yesterday.

A. will take B. took C. is taking D. takes

6. I usually ___________football.

A. will play B. is playing C. play D. played

PART D: WRITING

I. Rewrite each sentence so that it has the same meaning as the first one: (1.5pts)

1. How tall are you?

=> What__________________________________________________________?

2. Nam is a bad swimmer.

=> Nam swims _____________________________________________________

3. What is wrong with him?

=> What is the______________________________________________________?

4. You ought to take morning exercise

=>You should _____________________________________________________

5. I prefer living in the city.

=> I Prefer __________________________________________________________

II. Complete the following sentences with the words given:(1.0pt)

1. Let's/ buy a papaya.

=>_________________________________________________________________

2. Are you free/ Thursday?

=>_________________________________________________________________

1
18 tháng 2 2020

I. Circle the best option (A, B, C or D) to complete the passage below: (1.0pt)

Thirty years ago in Vietnam, very few people had TV sets. These TV owners were very (1)____________. After dinner, their neighbors (2)_____________both inside and outside their houses. Some watched through the windows. All evening, (3)____________ sat and watched the black and white programs. Times have changed. Today, many families have a TV set. They sit and watch (4) _____________ their own living rooms.

1. A. important B. wonderful C. expensive D. popular

2. A. gathers B. gathered C. gather D. to gather

3. A. he B. she C. they D. I

4. A.in B. at C. on D. to

II. Read the passage carefully and then answer the questions: (2.0pts)

A French oceanographer, Jacques Cousteau (1910 - 1997), invented a deep-sea diving vessel in the early 1940s. In the vessel, he could explore the oceans of the world and study underwater life. Now we can explore the oceans using special TV cameras as well. We can learn more about the undersea world thanks to this invention.

Questions:

1. When was Jacques Cousteau born?

In 1970

2. How old was he when he died?

He is 87 years old

3. What did he invent?

Early 1940

4. Can we learn more about the undersea world thanks to Jacques Cousteau's invention?

Yes, we can

PART : VOCABULARY & GRAMMAR

I. Circle the word that has different stress from others: (0.5pt)

1. A. aquarium B. material C. appointment D. temperature

2. A. adventure B. detective C. cucumber D. invention

II. Circle the word whose underlined part is pronounced differently from others: (0.5pt)

1. A. helped B. rented C. talked D. watched

1. A. baseball B. ask C. paripate D. basketball

III. Circle the word or phrase (A, B, C or D) that best completes each sentence: (1.5pt)

1. She smiled ___________ me in a friendly way when she saw me.

A. with B. to C. of D. at

2. We ___________ our grandparents next week.

A. visit B. will visit C. visited D. to visit

3. How ___________ is the blue hat? It's 50,000 dong.

A. far B. many C. old D. much

4. What about ___________to school every morning?

A. going B. go C. to go D. went

5. The nurse __________ Lan's temperature yesterday.

A. will take B. took C. is taking D. takes

6. I usually ___________football.

A. will play B. is playing C. play D. played

PART D: WRITING

I. Rewrite each sentence so that it has the same meaning as the first one: (1.5pts)

1. How tall are you?

=> What is the height of you?

2. Nam is a bad swimmer.

=> Nam swims badly

3. What is wrong with him?

=> What is the wrong with him?

4. You ought to take morning exercise

=>You should take morning exercise

5. I prefer living in the city.

=> I Prefer in the city than living in the countryside

II. Complete the following sentences with the words given:(1.0pt)

1. Let's/ buy a papaya.

=>Let's buy a papaya

2. Are you free/ Thursday?

=>Are you free on Thursday?

ai bt giúp nha thanhksI. Circle the best option (A, B, C or D) to complete the passage below: (1.0pt)Thirty years ago in Vietnam, very few people had TV sets. These TV owners were very (1)____________. After dinner, their neighbors (2)_____________both inside and outside their houses. Some watched through the windows. All evening, (3)____________ sat and watched the black and white programs. Times have changed. Today, many families have a TV set. They sit and watch (4) _____________ their own...
Đọc tiếp

ai bt giúp nha thanhks

I. Circle the best option (A, B, C or D) to complete the passage below: (1.0pt)

Thirty years ago in Vietnam, very few people had TV sets. These TV owners were very (1)____________. After dinner, their neighbors (2)_____________both inside and outside their houses. Some watched through the windows. All evening, (3)____________ sat and watched the black and white programs. Times have changed. Today, many families have a TV set. They sit and watch (4) _____________ their own living rooms.

1. A. important B. wonderful C. expensive D. popular

2. A. gathers B. gathered C. gather D. to gather

3. A. he B. she C. they D. I

4. A.in B. at C. on D. to

II. Read the passage carefully and then answer the questions: (2.0pts)

A French oceanographer, Jacques Cousteau (1910 - 1997), invented a deep-sea diving vessel in the early 1940s. In the vessel, he could explore the oceans of the world and study underwater life. Now we can explore the oceans using special TV cameras as well. We can learn more about the undersea world thanks to this invention.

Questions:

1. When was Jacques Cousteau born?

________________________________________________________________

2. How old was he when he died?

________________________________________________________________

3. What did he invent?

________________________________________________________________

4. Can we learn more about the undersea world thanks to Jacques Cousteau's invention?

________________________________________________________________

PART : VOCABULARY & GRAMMAR

I. Circle the word that has different stress from others: (0.5pt)

1. A. aquarium B. material C. appointment D. temperature

2. A. adventure B. detective C. cucumber D. invention

II. Circle the word whose underlined part is pronounced differently from others: (0.5pt)

1. A. helped B. rented C. talked D. watched

1. A. baseball B. ask C. participate D. basketball

III. Circle the word or phrase (A, B, C or D) that best completes each sentence: (1.5pt)

1. She smiled ___________ me in a friendly way when she saw me.

A. with B. to C. of D. at

2. We ___________ our grandparents next week.

A. visit B. will visit C. visited D. to visit

3. How ___________ is the blue hat? It's 50,000 dong.

A. far B. many C. old D. much

4. What about ___________to school every morning?

A. going B. go C. to go D. went

5. The nurse __________ Lan's temperature yesterday.

A. will take B. took C. is taking D. takes

6. I usually ___________football.

A. will play B. is playing C. play D. played

PART D: WRITING

I. Rewrite each sentence so that it has the same meaning as the first one: (1.5pts)

1. How tall are you?

=> What__________________________________________________________?

2. Nam is a bad swimmer.

=> Nam swims _____________________________________________________

3. What is wrong with him?

=> What is the______________________________________________________?

4. You ought to take morning exercise

=>You should _____________________________________________________

5. I prefer living in the city.

=> I Prefer __________________________________________________________

II. Complete the following sentences with the words given:(1.0pt)

1. Let's/ buy a papaya.

=>_________________________________________________________________

2. Are you free/ Thursday?

=>_________________________________________________________________

1

Circle the best option (A, B, C or D) to complete the passage below: (1.0pt)

Thirty years ago in Vietnam, very few people had TV sets. These TV owners were very (1)____________. After dinner, their neighbors (2)_____________both inside and outside their houses. Some watched through the windows. All evening, (3)____________ sat and watched the black and white programs. Times have changed. Today, many families have a TV set. They sit and watch (4) _____________ their own living rooms.

1. A. important B. wonderful C. expensive D. popular

2. A. gathers B. gathered C. gather D. to gather

3. A. he B. she C. they D. I

4. A.in B. at C. on D. to

I. Circle the best option (A, B, C or D) to complete the passage below: (1.0pt) Thirty years ago in Vietnam, very few people had TV sets. These TV owners were very (1)____________. After dinner, their neighbors (2)_____________both inside and outside their houses. Some watched through the windows. All evening, (3)____________ sat and watched the black and white programs. Times have changed. Today, many families have a TV set. They sit and watch (4) _____________ their own living rooms. 1. A....
Đọc tiếp

I. Circle the best option (A, B, C or D) to complete the passage below: (1.0pt)

Thirty years ago in Vietnam, very few people had TV sets. These TV owners were very (1)____________. After dinner, their neighbors (2)_____________both inside and outside their houses. Some watched through the windows. All evening, (3)____________ sat and watched the black and white programs. Times have changed. Today, many families have a TV set. They sit and watch (4) _____________ their own living rooms.

1. A. important B. wonderful C. expensive D. popular

2. A. gathers B. gathered C. gather D. to gather

3. A. he B. she C. they D. I

4. A.in B. at C. on D. to

II. Read the passage carefully and then answer the questions: (2.0pts)

A French oceanographer, Jacques Cousteau (1910 - 1997), invented a deep-sea diving vessel in the early 1940s. In the vessel, he could explore the oceans of the world and study underwater life. Now we can explore the oceans using special TV cameras as well. We can learn more about the undersea world thanks to this invention.

Questions:

1. When was Jacques Cousteau born?

________________________________________________________________

2. How old was he when he died?

________________________________________________________________

3. What did he invent?

________________________________________________________________

4. Can we learn more about the undersea world thanks to Jacques Cousteau's invention?

________________________________________________________________

PART : VOCABULARY & GRAMMAR

I. Circle the word that has different stress from others: (0.5pt)

1. A. aquarium B. material C. appointment D. temperature

2. A. adventure B. detective C. cucumber D. invention

II. Circle the word whose underlined part is pronounced differently from others: (0.5pt)

1. A. helped B. rented C. talked D. watched

1. A. baseball B. ask C. participate D. basketball

III. Circle the word or phrase (A, B, C or D) that best completes each sentence: (1.5pt)

1. She smiled ___________ me in a friendly way when she saw me.

A. with B. to C. of D. at

2. We ___________ our grandparents next week.

A. visit B. will visit C. visited D. to visit

3. How ___________ is the blue hat? It's 50,000 dong.

A. far B. many C. old D. much

4. What about ___________to school every morning?

A. going B. go C. to go D. went

5. The nurse __________ Lan's temperature yesterday.

A. will take B. took C. is taking D. takes

6. I usually ___________football.

A. will play B. is playing C. play D. played

PART D: WRITING

I. Rewrite each sentence so that it has the same meaning as the first one: (1.5pts)

1. How tall are you?

=> What__________________________________________________________?

2. Nam is a bad swimmer.

=> Nam swims _____________________________________________________

3. What is wrong with him?

=> What is the______________________________________________________?

4. You ought to take morning exercise

=>You should _____________________________________________________

5. I prefer living in the city.

=> I Prefer __________________________________________________________

II. Complete the following sentences with the words given:(1.0pt)

1. Let's/ buy a papaya.

=>_________________________________________________________________

2. Are you free/ Thursday?

=>_________________________________________________________________

0
A - PHONETICSI. Choose the word that has the underlined part different from others.1. A. wanted B. showed C. travelled D. rained2. A. carbon B. hard C. marry D. largeII. Choose the word that has main stress placed differently from others.3. A. picture B. receive C. famous D. lovely4. A. artist B. rename C. relax D. explainB - USE OF LANGUAGEChoose the best answer A, B, C or D to complete the following sentences.5. When the bus stops, the students say goodbye to the driver and _____.A. walk on...
Đọc tiếp

A - PHONETICS

I. Choose the word that has the underlined part different from others.

1. A. wanted B. showed C. travelled D. rained

2. A. carbon B. hard C. marry D. large

II. Choose the word that has main stress placed differently from others.

3. A. picture B. receive C. famous D. lovely

4. A. artist B. rename C. relax D. explain

B - USE OF LANGUAGE

Choose the best answer A, B, C or D to complete the following sentences.

5. When the bus stops, the students say goodbye to the driver and _____.

A. walk on B. walk of C. get on D. get off

6. Hilarious is a kind of film which makes viewers________a lot.

A. cry B. frighten C. shock D. laugh

7. My dream last night was so ______ . I cried when I woke up.

A. gripping B. hilarious C. scary D. entertaining

8. We should____________ energy-saving light bulbs.

A. using B. use C. used D. to use

9. Mai used to _________to school on foot.

A. go B. going C. gone D. went

10. ____________ being frightened by characters, Lan still liked the film so much.

A. In spite B. Although C. Despite D. Nevertheless

11. They will ______ dinner with their grandparents at 7 p.m. tonight.

A. has B. have C. having D. be having

12. A friend of __________ is coming to stay with me next Sunday.

A. I B. mine C. my D. me

13. You are interested in horror films, ______?

A. don’t you B. aren’t you C. do you D. are you

Choose the letter A, B, C or D to indicate the most suitable response.

14. “Congratulations to you on winning the first prize!” - “_____________.”

A. You’re welcome B. Thanks a lot C. It doesn’t matter D. It’s my pleasure

15. “How do you go to school?” - “_____________.”

A. School is fun B. Buses are crowded C. By bus D. It takes about ten minutes

Circle the letter A, B, C or D to indicate the words CLOSEST in meaning to the underlined words in each of the following questions.

16. Exercising will help you stay in shape.

A. thin B. chubby C. keep fit D. tall

17. My brother is interested in pointing out my mistakes.

A. likes B. hates C. supports D. knows

Circle the letter A, B, C or D indicate the words OPPOSITE in meaning to the underlined words in each of the following questions.

18. If you follow these simple rules, you will save lots of money.

A. earn B. count C. waste D. replace

19. Solar energy doesn't cause pollution, but it is not cheap.

A. expensive B. effective C. commercial D. possible

2
3 tháng 8 2021

I. Choose the word that has the underlined part different from others.

1. A. wanted B. showed C. travelled D. rained

2. A. carbon B. hard C. marry D. large

II. Choose the word that has main stress placed differently from others.

3. A. picture B. receive C. famous D. lovely

4. A. artist B. rename C. relax D. explain

B - USE OF LANGUAGE

Choose the best answer A, B, C or D to complete the following sentences.

5. When the bus stops, the students say goodbye to the driver and _____.

A. walk on B. walk of C. get on D. get off

6. Hilarious is a kind of film which makes viewers________a lot.

A. cry B. frighten C. shock D. laugh

7. My dream last night was so ______ . I cried when I woke up.

A. gripping B. hilarious C. scary D. entertaining

8. We should____________ energy-saving light bulbs.

A. using B. use C. used D. to use

9. Mai used to _________to school on foot.

A. go B. going C. gone D. went

10. ____________ being frightened by characters, Lan still liked the film so much.

A. In spite B. Although C. Despite D. Nevertheless

11. They will ______ dinner with their grandparents at 7 p.m. tonight.

A. has B. have C. having D. be having

12. A friend of __________ is coming to stay with me next Sunday.

A. I B. mine C. my D. me

13. You are interested in horror films, ______?

A. don’t you B. aren’t you C. do you D. are you

Choose the letter A, B, C or D to indicate the most suitable response.

14. “Congratulations to you on winning the first prize!” - “_____________.”

A. You’re welcome B. Thanks a lot C. It doesn’t matter D. It’s my pleasure

15. “How do you go to school?” - “_____________.”

A. School is fun B. Buses are crowded C. By bus D. It takes about ten minutes

Circle the letter A, B, C or D to indicate the words CLOSEST in meaning to the underlined words in each of the following questions.

16. Exercising will help you stay in shape.

A. thin B. chubby C. keep fit D. tall

17. My brother is interested in pointing out my mistakes.

A. likes B. hates C. supports D. knows

Circle the letter A, B, C or D indicate the words OPPOSITE in meaning to the underlined words in each of the following questions.

18. If you follow these simple rules, you will save lots of money.

A. earn B. count C. waste D. replace

19. Solar energy doesn't cause pollution, but it is not cheap.

A. expensive B. effective C. commercial D. possible

3 tháng 8 2021

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