31. - He is fluent in English because he once stayed in London.

- Really ?How long ________ there?

A. did he live 　　　　　　　　　　　　　 B. has he lived C. had he lived 　　 D. does he live

30. Researchers were digging all the important reasons why a virus ________ to have killed many people around had not infected this person.

A. was known　　 B. to be known　　 　　　　　　 C. known　　　 　 D. having known

29. - I want someone to write the composition for me.

- No. As a student, you ________ depend on yourself.

A. shall　　 　　　　　　　　　　　　　　 B. will　　 　　 C. can　　　　　 D. may

28. - The patient feels better now.

- I know ________.

A. he feels　　　　 B. he does　　　 　　　　　　　 C. he does so　 　 D. he does it

27. When exposed to stress, in ________ form, all of us react both chemically and physically.

A. whichever　 　　　　　　　　　　　　 B. whatever 　　 C. however D. whenever

26. When it comes to friends, I desire ________ who share my happiness and interest.

A. anyone 　　　　　　　　　　　　　　　 B. any　　　　　　　 C. one 　　　　 D. those

25. I asked him ________we had to go. He told me just two more miles.

A. how much longer 　　　　　　　　 B. how much farther 　　　　　 C. how long 　 D. how far

24. ________ Dad away, Mum had to shoulder the burden of the family.

A. As 　　　　　　　　　　　　　　　　　　　 B. With 　　　　　 C. For 　　　　 D. Because

23. In my view, ________ seems to be no possibility that we shall be able to afford that big a house.

A. that　 　　　　　　　　　　　　　　　　　 B. it 　　　　　　　　 C. there 　　　 D. this

22. ________ your homework carefully, and some spelling mistakes can be avoided.

A. Had you checked 　　　　　　　　 B. Check　 　　　 C. Checking D. If you check