Task 4: Choose the correct answers. Write A, B, C or D on the answer sheet. (0.2pt) 1. After following his instructor’s...

Hãy tham gia nhóm Học sinh Hoc24OLM

BB

Bon Bon

27 tháng 8 2021 lúc 12:34

Task 20: What do the underlined words refer to? Select the correct answers. Write your answers (A, B or C) on the answer sheet. (0.2pt)An alien civilization could choose many different ways of sending information across the galaxy, but many of these either require too much energy, or else are severely attenuated while traversing the vast distances across the galaxy. It turns out that, for a given amount of transmitted power, radio waves in the frequency range 1000 to 3000 MHz travel the greatest...

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Task 20: What do the underlined words refer to? Select the correct answers. Write your answers (A, B or C) on the answer sheet. (0.2pt)

An alien civilization could choose many different ways of sending information across the galaxy, but many of these either require too much energy, or else are severely attenuated while traversing the vast distances across the galaxy. It turns out that, for a given amount of transmitted power, radio waves in the frequency range 1000 to 3000 MHz travel the greatest distance, and so all searches to date have concentrated on looking for radio waves in this frequency range. So far there have been a number of searches by various groups around the world, including Australian searches using the radio telescope at Parkes, New South Wales. Until now there have not been any detections from the few hundred stars (1) which have been searched. The scale of the searches has been increased dramatically since 1992, when the US Congress voted NASA $10 million per year for ten years to conduct a thorough search for extra-terrestrial life. Much of the money in (2) this project is being spent on developing the special hardware needed to search many frequencies at once.

1. A. the few hundred stars B. any detections C. scientists

2. A. the US Congress B. a thorough search for extra-terrestrial life C. NASA

Task 21: Rearrange the words/phrases to make complete sentences. Select the correct sentences. Write your answers (A, B or C) on the answer sheet. (0.4pt) Example: my / I / scarves / beautiful / forgot / two / pack / to /.

--> Answer: I forgot to pack my two beautiful scarves.

1. Knives / dangerous / not / as / as / are / guns /.

A. Knives are not as dangerous as guns. B. Knives not are as dangerous as guns. C. Knives as are not dangerous as guns.

2. would / I / say / please / to / like / something.

A. I would like to say please something. B. I would like to say something please.

C. I would say to like something please.

Task 22: Combine these words to make sentences, using the correct word forms. Select the correct sentences. Write your answers (A, B or C) on the answer sheet. (0.4pt)

Example: I/ want/see/you/ office.

--> Answer: I want to see you in my office.

1. What/ qualities/ you/ need/ be/ good/ journalist/?

A. What qualities you need be a good journalist?

B. What qualities do you need to be a good journalist?

C. What qualities you need to be a good journalist?

2. If/ you/ afraid/ speak/ public/ you/ be/not/ alone/!/

A. If you afraid speak in public, you are not alone!

B. If you are afraid of speak in public, you are not alone!

C. If you are afraid of speaking in public, you are not alone!

Task 23: Rewrite each sentence without changing the meaning of the given sentence. Begin the new sentence with the suggested word. Write your answers on the answer sheet. (0.4pt)

Ex: When I came, he was having dinner. → When………………………………………. Answer: When I arrived, he was having dinner.

1. I advise you not to stay up late every night.

-You should………………………………….

2. She didn’t accept my proposal yesterday.

- My proposal…………………………………

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Lớp 10 Tiếng anh Luyện tập tổng hợp

BB

Bon Bon

27 tháng 8 2021 lúc 16:23

Task 20: What do the underlined words refer to? Select the correct answers. Write your answers (A, B or C) on the answer sheet. (0.2pt)An alien civilization could choose many different ways of sending information across the galaxy, but many of these either require too much energy, or else are severely attenuated while traversing the vast distances across the galaxy. It turns out that, for a given amount of transmitted power, radio waves in the frequency range 1000 to 3000 MHz travel the greatest...

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Task 20: What do the underlined words refer to? Select the correct answers. Write your answers (A, B or C) on the answer sheet. (0.2pt)

An alien civilization could choose many different ways of sending information across the galaxy, but many of these either require too much energy, or else are severely attenuated while traversing the vast distances across the galaxy. It turns out that, for a given amount of transmitted power, radio waves in the frequency range 1000 to 3000 MHz travel the greatest distance, and so all searches to date have concentrated on looking for radio waves in this frequency range. So far there have been a number of searches by various groups around the world, including Australian searches using the radio telescope at Parkes, New South Wales. Until now there have not been any detections from the few hundred stars (1) which have been searched. The scale of the searches has been increased dramatically since 1992, when the US Congress voted NASA $10 million per year for ten years to conduct a thorough search for extra-terrestrial life. Much of the money in (2) this project is being spent on developing the special hardware needed to search many frequencies at once.

1. A. the few hundred stars B. any detections C. scientists

2. A. the US Congress B. a thorough search for extra-terrestrial life C. NASA

Task 21: Rearrange the words/phrases to make complete sentences. Select the correct sentences. Write your answers (A, B or C) on the answer sheet. (0.4pt) Example: my / I / scarves / beautiful / forgot / two / pack / to /.

--> Answer: I forgot to pack my two beautiful scarves.

1. Knives / dangerous / not / as / as / are / guns /.

A. Knives are not as dangerous as guns. B. Knives not are as dangerous as guns. C. Knives as are not dangerous as guns.

2. would / I / say / please / to / like / something.

A. I would like to say please something. B. I would like to say something please.

C. I would say to like something please.

Task 22: Combine these words to make sentences, using the correct word forms. Select the correct sentences. Write your answers (A, B or C) on the answer sheet. (0.4pt)

Example: I/ want/see/you/ office.

--> Answer: I want to see you in my office.

1. What/ qualities/ you/ need/ be/ good/ journalist/?

A. What qualities you need be a good journalist?

B. What qualities do you need to be a good journalist?

C. What qualities you need to be a good journalist?

2. If/ you/ afraid/ speak/ public/ you/ be/not/ alone/!/

A. If you afraid speak in public, you are not alone!

B. If you are afraid of speak in public, you are not alone!

C. If you are afraid of speaking in public, you are not alone!

Task 23: Rewrite each sentence without changing the meaning of the given sentence. Begin the new sentence with the suggested word. Write your answers on the answer sheet. (0.4pt)

Ex: When I came, he was having dinner. → When………………………………………. Answer: When I arrived, he was having dinner.

1. I advise you not to stay up late every night.

-You should………………………………….

2. She didn’t accept my proposal yesterday.

- My proposal…………………………………

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Lớp 10 Tiếng anh Luyện tập tổng hợp

BB

Bon Bon

26 tháng 8 2021 lúc 16:22

Task 9: Complete the sentences with correct answers. Write A, B, or C on the answer sheet. (0.2pt)Example: I usually go to the supermarket ________ the weekend.A. on B. in C. ofAnswer: A1. My brother has trained as a professional gamer ________he graduated from high school.A. when B. while C. since2. I have to work ________ the best way to shoot an episode.A. for B. off C. outTask 10: Choose the correct answer. Write A, B, C, D on the answer sheet. (0.2pt) Example: There is too ________ stuff in...

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Task 9: Complete the sentences with correct answers. Write A, B, or C on the answer sheet. (0.2pt)

Example: I usually go to the supermarket ________ the weekend.

A. on B. in C. of

Answer: A

1. My brother has trained as a professional gamer ________he graduated from high school.

A. when B. while C. since

2. I have to work ________ the best way to shoot an episode.

A. for B. off C. out

Task 10: Choose the correct answer. Write A, B, C, D on the answer sheet. (0.2pt) Example: There is too ________ stuff in this room.

A. much B. many C. some D. any

Answer: A

1. Hurry up! We only have ________ time left before the teacher leaves.

A. a little B. a few C. a lot of D. much

2. Eating out is very costly in district 1! There aren’t ________ cheap restaurants.

A. some B. much C. any D. a little

Task 11: Correct the mistake in each sentence. Write your answers on the answer sheet. (0.2pt)

Example: Charlie went to the tickets office last week. Answer: tickets → ticket

1. Keep silent, please! My daughter sleeps in the room.

2. Susan often burn the midnight oil to complete her given tasks.

Task 12: Choose the correct article to complete the sentences. Write A, B, C or D on the answer sheet. (0.2pt)

Example: I met ________ few American tourists when I was in Italy.

A. a B. an C. the D. 

Answer: A

1. Yesterday, I met ________one-eyed man.

A. an B. a C. the D. 

2. Please take a seat here! The director will be back in ________hour.

A. an B. a C. the D. 

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Lớp 10 Tiếng anh Luyện tập tổng hợp

NS

nguyen ngoc son

27 tháng 7 2023 lúc 10:54

Mark A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions 1.The recession is killing companies off like flies, so its difficult for anyone to apply for ....A.big shotB. tall orderC. heavy newsD. soft thing2.Working from home has become increasingly ....Everyone is easily adaptable to this.A prevalentB. imaginativeC. impressiveD. confident3.I want to england to have the chance to ..... a bit of englishA bring upB. give upC. turn upD.pick up

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Mark A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

1.The recession is killing companies off like flies, so it's difficult for anyone to apply for ....

A.big shot

B. tall order

C. heavy news

D. soft thing

2.Working from home has become increasingly ....Everyone is easily adaptable to this.

A prevalent

B. imaginative

C. impressive

D. confident

3.I want to england to have the chance to ..... a bit of english

A bring up

B. give up

C. turn up

D.pick up

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Lớp 10 Tiếng anh Luyện tập tổng hợp

HM

Ha My

22 tháng 3 2020 lúc 7:35

VERB TENSES. I. Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. 1. Since 1980, scientists the world over ___ a lot of things to fight against AIDS. A. have done B. are doing C. did D. had done 2. Many people _______ of malaria/məleəriæ/bệnh sốt rét , smallpox /smɔ:lpɒks/bệnh đậu mùa before the process of vaccination was invented in the 19th century....

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VERB TENSES.

I. Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

1. Since 1980, scientists the world over ___ a lot of things to fight against AIDS.

A. have done B. are doing C. did D. had done

2. Many people _______ of malaria/mə'leəriæ/bệnh sốt rét , smallpox /smɔ:lpɒks/bệnh đậu mùa before the process of vaccination was invented in the 19^th century.

A. have died B. had died C. would die D. were dying

3. The doctor said that his appetite/'æpitait/sự ngon miệng _______ him restore ( phục hồi)his health quickly.

A. has helped B. helps C. would help D. is helping

4. My girl friend arrived after I ______ for her about half an hour.

A. was waiting B. had been waiting D. have been waiting D. had waited

5. ______ to rain before you woke up this morning?

A. Did it begin B. Has it begun C. Had it begun D. Would it begin

6. I just want to know what you ____ at this time tomorrow afternoon.

A. are going to do B. will be doing C. are doing D. do

7. I am reading this novel. By the time you come back from work I ________-.

A. shall finish B. will finish C. shall have finished D. have finished

8. He ______the piano every day. A. practice B. practices C. is practicing D. has practiced

9. He _____________ now. A. is swimming B. swims C. swim D. has swum

10. John and I_______ pen pals for nearly 3 years. A. am B. are C. has been D. have been

11. I ____ to the market with my mother yesterday. A. go B. went C. have gone D. was going

12. The electricity went out while mother __________ a magazine.

A. read B. reads C. was reading D. reading

13. After he ____________his work, he sat down to write some letters.

A. finishes B. has finished C. had finished D. have finished

14. I_____________ your brother recently.

A. haven’t seen B. hasn’t seen C. am not seeing D. don’t see

15. She __________many people since she came here in June.

A. met B. has met C. was meeting D. have met

16. We ____Math at this time last week. A. were learning B. are learning C. was learning D. learnt

17. She was playing games while he _____a football match.

A. watched B. watches C. was watching D. watching

18. She _____to Ho Chi Minh city last year. A. goes B. has gone C. go D. went

19. He __________football now. A. are playing B. plays C. is playing D. played

20. Every morning, I often sit in my garden and____ to my nightingale sing.

A. listening B. listen C. listened D. listens

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Lớp 10 Tiếng anh Luyện tập tổng hợp

H24

johnyycareme

12 tháng 2 2019 lúc 20:18

Question I: Choose the word whose underlined part is pronounced differently from that of the others in the same line and write A, B, C or D on your answer sheet (3 points). 1. A. ghost B. mosque C. optional D. tropical 2. A. pleased B. erased C. increased D. amused 3. A. honor B. honest C. hour D. hero...

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Question I: Choose the word whose underlined part is pronounced differently from that of the others in the same line and write A, B, C or D on your answer sheet

(3 points).

1. A. ghost B. mosque C. optional D. tropical

2. A. pleased B. erased C. increased D. amused

3. A. honor B. honest C. hour D. hero

Question II: Choose the word whose stress pattern is different from that of the others in the same line and write A, B, C or D on your answer sheet (2 points)

1. A. economic B. economy C. minority D. encourage

2. A. reputation B. description C. suggestion D. pollution

PART B: GRAMMAR AND VOCABULARY (40 points)

Question I: Supply the correct form of the verbs in brackets. Write the answers on your answer sheet (15 points)

1. No one expected that he ________(be) so successful.

2. They (learn)_______ English from nine to ten in this room. Don’t let anyone disturb them then.

3. Five kilometres (be) ________a long way for a little boy to walk.

4. “Are you leaving?” - “Yes, but I wish I (not have)_______ to go.

5. Were he ten years younger, he (take) ________part in the voyage around the world.

6. “Where’s Mary?” -“She (cook) _____ in the kitchen”

7. It (rain) ________ when I got up this morning.

8. I used to (play) ___________ chess with my father when I was a child.

9. Mr. Hung ( teach) ______ us English five years ago.

10. When I saw him, he (sit) ______ asleep in a chair.

11. There (be) ______ an English class in this room tomorrow evening.

12. Where are you?- I’m upstairs. I (have) ______ a bath.

13. When he phoned us yesterday, we ( play) _______ .

14. Be quiet! The baby (sleep) ______.

15. My bike is not here. Someone ( steal)______ it.

Question II: Supply the correct form of the capital words in brackets. Write the answers on your answer sheet (10 points)

1. What is your _______ television program? (FAVOR)

2. The ______ have to cook rice in this contest. ( PARTICIPATE)

3. He was able to provide the police with some ______ information. (VALUE)

4. ________, I found my car key. (LUCK)

5. This hotel looks clean and _______. (COMFORT)

6. Peter is an _______member of our club. (ACT)

7. Nam can play the guitar very well. He is a good__________. (GUITAR)

8. We started our trip on a beautiful _______ morning. (SUN)

9. There are a lot of _______ festivals in Viet Nam. (TRADITION)

10. The teacher was extremely_______ because we failed the exam. (HAPPY)

Question III: Choose the word/ phrase that best fits the gap in each of the following sentences and write A, B, C or D on your answer sheet. (15 points)

1. How many people took part _________ the contest?

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

2. The man ___________his car outside hasn’t come back for it yet.

A. whom left B. who he left C. who left D. whose left

3. Andrew came to the party ____________ he hadn't been invited.

A. although B. despite C. in case D. even

4. Our teacher wants us to attend his classes_________.

A. abruptly B. regularly C. widely D. Logically

5. The competition starts _________9 a.m on Wednesday.

A. at B. for C. in D. On

6. Nga is both_____________ and intelligent.

A. beauty B. beautiful C. beautify D. beautifully

7. Your children go to school in the morning,_________?

A. do they B. does he C. don’t they D. doesn’t he

8. I enjoy playing badminton, volleyball,_________ table tennis.

A. and B. or C. but D. so

9. Everyone likes him because he is_________ honest boy.

A. a B. an C. the D. Ø

10. We didn’t stay in the city very long_________it was noisy and dirty.

A. although B. however C. because D. so

11. My daughter likes to dress ____________ without my help.

A. her B. hers C. she D. herself

12. Hometown is a place _________we were born and grew up.

A. where B. which C. when D. why

13. You are really interested_________ studying abroad, aren’t you?

A. at B. on C. with D. in

14. Can this car _________________?

A. repair B. repaired C. repairing D. be repaired

15. Mrs. Lee is very good at speaking _________ Korean.

A. a B. an C. the D. Ø

PART C: READING (20 points)

Question I: Read the text below and choose the most suitable word from the ones given to fill in each gap. Write the answers on your answer sheet (15 points)

(stay, ago, been, for, after, there’s, be, done, would, take,

remembered, impossible, what, that, with )

I came to this village five years ______ (1) because I wanted to teach people about modern health care. I will be leaving in about two months. I wish I could ______ (2) longer, but it’s time ______ (3) me to go home. My work here has ______ (4) very interesting. I am learning so much. I always wish that there would ______ (5) more hours in the day so ______ (6) I could do more work here. Maybe it’s silly, but I worry about ______ (7) will happen to the villagers ______ (8) I leave. I wish my students ______ (9) all the things I’ve tried ______ (10) them. I’ve become so close to the people here, I wish I could ______ (11) them home with me! But that’s______ (12), of course. I wish more people ______ (13) join the Peace Corps. It’s so rewarding (satisfying) and ______ (14) so much work to be ______ (15).

Question II: Read the text and answer the questions that follow. Write the answers on your answer sheet (5 points)

Fiona and Frank were sister and brother. Although they loved each other, they always quarrelled with each other. They quarrelled almost every day over the smallest things.

One day, Fiona and Frank were watching television. Frank switched the channel suddenly. This irritated Fiona. She grabbed the remote control from Frank and switched the channel back to the one that she was watching. “You are such a rude girl!” Frank shouted at Fiona. Fiona looked at Frank and said angrily, “And you are the most annoying brother in the whole wide world!”. The next moment, Fiona and Frank were punching and pinching each other. Suddenly, Frank screamed in pain. His mouth was bleeding. When Fiona saw the blood, she ran to get her father.

“ Is Frank going to be all right?” Fiona asked her father with a worried look on her face. Before her father could answer, Frank said, “ I am okay, Fiona. It’s just a small cut. Don’t worry.” Then Frank gave her a big smile and Fiona rushed forward to give him a hug.

1. How often would Fiona and Frank quarrel with each other?

2. Why was Fiona irritated?

3. What did Frank accuse Fiona of?

4. What happened immediately after Fiona said that Frank was the most annoying brother?

5. How did Fiona show her love for Frank?

PART D: WRITING (15 points)

Question I: Rearrange the given words to make meaningful sentences. Write the answers on your answer sheet (5 points)

1. radio / years / about / Marconi/ ago / a / invented / hundred.

2. you/ Did/ the/ summer/ go/ last/ to/ beach?

3. free/ I/ If/ would/ books/ read/ had/ I /time.

4. I / call / will / you / the police / don't / if /me / leave / alone.

5. was / so / The girl / everyone/ that / admired / beautiful / her.

Question II: Complete the following sentences using the given words. Write the answers on your answer sheet (5 points)

1. Minh / answer / very soft / so / teacher / not hear / her / clear.

2. my/ pen pal/ want/ visit/ Ha Long Bay / next/ summer.

3. I / wish/ I/ taller.

4. I suggest/ fixing/ faucet.

5. He / be / excited /go to Greece / holiday

Question III: Rewrite the following sentences beginning as shown so that the meanings stay the same. Write the answers on your answer sheet (5 points)

1. The fire will go out if he doesn’t put more wood on.

--> Unless___________________________________________

2. “ How many survivors are there?” asked the journalist.

--> The journalist wanted to know________________________

3. What type of clothing do you like best?

-> What is ___________________________________________?

4. When they were young, they lived in Paris.

-> They used ______________________________________.

5. People speak English as the first language in many countries.

-> English _________________________________________.

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Lớp 10 Tiếng anh Luyện tập tổng hợp

NS

nguyen ngoc son

30 tháng 7 2023 lúc 10:44

Mark A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions33.It is .... for a company to force an employee into early retirement.A. illegibleB. illegalC. illiterateD. illusive34.There was nothing to prevent her from ......... her ambitions.A. devotingB. fosteringC. realisingD. looking36.When my .... comes in, well live in one of these huge mansions on the hill. A. cow B. car C. boat D. ship37.he .... have seen the Statue of Liberty. He came to New Yo...

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Mark A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

33.It is .... for a company to force an employee into early retirement.

A. illegible

B. illegal

C. illiterate

D. illusive

34.There was nothing to prevent her from ......... her ambitions.

A. devoting

B. fostering

C. realising

D. looking

36.When my .... comes in, we'll live in one of these huge mansions on the hill. A. cow B. car C. boat D. ship

37.he .... have seen the Statue of Liberty. He came to New York by ship.

A. should B. must C. need D. will

38. She .... have passed because she hadn't studied enough.

A. shouldn't B. couldn't C. needn't D. mustn't

39 By the time she finishes her work, I ..... to help her.

A. have come

B. was coming

C. had come

D. will have come

40. Since last winter, she .... the library to read books.

A. hasn't gone B. didn't go C. doesn't go D. isn't going

41. After getting some sleep, I was as fresh as a ...

A. dew B. daisy C. rose D. snow

42. This is Hoa's bike. She .... here somewhere

A. is

B. must be

C. can't be

D.may

43.After they ....... the project, they will start the new plan.

A. have completed

B. had completed

C. completed

D. have been completed

44. I wish that my mother .... busy today to help me with the housework.

A. hadn't been B. weren't C. isn't D. won't

45. I wish I ....to the party with my closest friend last night.

A. came

B. had come

C. would come

D. have come

46. Only after clicking "send" .... that I hadn't attached the file.

A. do I realize

B. I realized

C. did I realize

D. I was realized

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Lớp 10 Tiếng anh Luyện tập tổng hợp

TH

Trần Lê Thị Thanh Hồng

28 tháng 8 2021 lúc 13:52

Giúp mình với ạTask 8: Complete the sentences with the correct form of the verbs. Write A, B, or C on the answer sheet. (0.2pt) 1. I can’t afford ________ going to college. A. continue B. to continue C. continued 2. My sister’s best friend is getting ________ next month. A. married B. marrying C. to marry Task 9: Complete the sentences with correct answers. Write A, B, or C on the answer sheet. (0.2pt) 1. My brother has trained as a professional gamer ________he graduated from high school. A. w...

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Giúp mình với ạ

Task 8: Complete the sentences with the correct form of the verbs. Write A, B, or C on the answer sheet. (0.2pt)

1. I can’t afford ________ going to college.

A. continue B. to continue C. continued

2. My sister’s best friend is getting ________ next month.

A. married B. marrying C. to marry

Task 9: Complete the sentences with correct answers. Write A, B, or C on the answer sheet. (0.2pt)

1. My brother has trained as a professional gamer ________he graduated from high school.

A. when B. while C. since

2. I have to work ________ the best way to shoot an episode.

A. for B. off C. out

Task 10: Choose the correct answer. Write A, B, C, D on the answer sheet. (0.2pt)

1. Hurry up! We only have ________ time left before the teacher leaves.

A. a little B. a few C. a lot of D. much

2. Eating out is very costly in district 1! There aren’t ________ cheap restaurants.

A. some B. much C. any D. a little

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Lớp 10 Tiếng anh Luyện tập tổng hợp

NS

nguyen ngoc son

30 tháng 7 2023 lúc 15:08

Mark A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions41. After getting some sleep, I was as fresh as a ... A. dew B. daisy C. rose D. snow42. This is Hoas bike. She .... here somewhereA. is B. must be C. cant be D.may43.After they ....... the project, they will start the new plan.A. have completed B. had completed C. completed D. have been completed44. I wish that my mother .... busy today to help me with the housework.A. hadnt been B. werent C...

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Mark A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

41. After getting some sleep, I was as fresh as a ...

A. dew B. daisy C. rose D. snow

42. This is Hoa's bike. She .... here somewhere

A. is B. must be C. can't be D.may

43.After they ....... the project, they will start the new plan.

A. have completed B. had completed C. completed D. have been completed

44. I wish that my mother .... busy today to help me with the housework.

A. hadn't been B. weren't C. isn't D. won't

45. I wish I ....to the party with my closest friend last night.

A. came B. had come C. would come D. have come

46. Only after clicking "send" .... that I hadn't attached the file.

A. do I realize B. I realized C. did I realize D. I was realized

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Lớp 10 Tiếng anh Luyện tập tổng hợp

Luyện tập tổng hợp

Khoá học trên OLM (olm.vn)

Khoá học trên OLM (olm.vn)

Luyện tập tổng hợp

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Khoá học trên OLM (olm.vn)

Khoá học trên OLM (olm.vn)