Choose the best answers to complete the following sentences.

(Chọn đáp án đúng nhất để hoàn thành các câu sau.)

17. My mother has practised yoga __________ more than ten years.

A. for

B. since

C. in

D. after

18. I have built up my muscles __________ I started working out.

A. for

B. since

C. in

D. already

19. My sister had a stomach ache, so she __________ to see the doctor last week.

A. has gone

B. has been to

C. went

D. goes

20. My parents have __________ bought a treadmill, so now I can walk or run on it whenever I want.

A. yet

B. so far

C. since

D. just

21. He __________. What’s wrong with him?

A. looks so worried

B. looks so worriedly

C. is looking so worried

D. is looking so worriedly

22. My father __________ of going on a diet. He’s put on weight recently.

A. thinks

B. is thinking

C. thought

D. has thought

23. Dr Wilson, I’m not feeling well today. I __________ a terrible headache.

A. am having

B. had

C. have

D. have had

24. Lan, __________ our aerobics instructor? She’s become very famous.

A. are you remembering

B. were you remembering

C. will you remember

D. do you remember

25. I think you __________ talk to your parents about it. I’m sure they’ll give you the best advice.

A. should

B. shouldn’t

C. have to

D. don’t have to

26. You __________ stay out after 10 p.m. Remember to be back home by then.

A. must

B. mustn’t

C. should

D. don’t have to

27. My grandmother __________ leave school at the age of 14, so she could help her mother with household chores.

A. must

B. should

C. had to

D. mustn’t

28. Parents __________ compare their children with others' because their children may start believing they are not able to perform well.