20. Today English is..............international language.

A. more B. most C. the most D. the more

21. Of all the candidates, Mary is probably......

A. the less qualified  B. the qualified less C. the most little qualified D. the least qualified

22. My father is........ age as hers.

 A. as same B. the most same C. the same D. more same

23. More......90 per cent of the students passed the test.

A. of B. that C. then D. than

24. Of the two tables, the round one is...........

A. the nicest B. the nicer C. nicer D. a nice one

25. Going by motorbike isn't........convenient as going by car.

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

26. This car is........... than mine.

A less expensive B. as expensive C. expensive D. not so expensive

27. The sooner, the........

A. better B. best C. good D. more good

28. He has.......money than his wife.

 A. least B. fewer C. less D. fewest

29. .........all the cities I've visited, I like Nha Trang the best.

A. Of B. From C. Out D. With

30. She is.............her sister. 

A. much more good B. much better than C. much better D. the best than

20. C. the most → so sánh nhất

21. D. the least qualified → the least: ít nhất

22. C. the same → the same as: bằng nhau, như nhau

23. D. more ⇒ so sánh hơn

24. C. nicer → so sánh 2 vật với nhau

25. D ⇒ so/ as  + adj + as: so sánh bằng

26. A → so sánh hơn

27. A → càng ..., càng...

28. B → few + N, less + adj

29. A

30. B <dùng phương pháp loại trừ>