21. The news has spread all over the country ________ the spaceship succeeded in returning to the earth.

　　A. that　　　　 B. which　　　　C. whether　　 D. what

　　22. You can choose ________ book you like among these.

　　A. no matter what B. whatever C. whose D. whichever

　　23. Is this research center ________ we visited the modern equipment last year?

　　A. where B. that C. the one D. which

　　24. Loulan city is not at all _______a traveler who has never seen the desert before can expect.

　　A. what B. that C .which D. where

　　25. What the doctor is uncertain about is ______ my mother will recover from the serious disease soon.

　　A. when B. how C. whether D. why

　　26. We should buy our daughter a computer in ______ it can help to improve her English.

　　A. which B. that C. what D. whom

　　27. I wish to have a friend with ______ shares my hobbies and interests.

　　A. whomever B. no matter who C. whoever D. anyone

　　28. Why don’t you bring _______ to his attention that you are too busy to do it.

　　A. this B. what C. that D. it

　　29. The task required _______ did it ______ careful and brave enough.

　　A. who; is B. whom; was

　　C. whomever; were D. whoever; be

　　30. We wrote a letter of thanks to _______ had helped us.

　　A. who B. those C. whom D. whoever

　　31.--- What are you anxious about?

　　--- ___________.

　　A. Whether we can succeed B. If we succeed

　　C. Do you succeed D. That we can succeed

　　32. I just don’t understand_______ that prevents so many Americans from being as happy as one might expect.

　　A .why it does B. what it does C. what it is D. why it is

　　33. ---I rang you at about ten, but there was no reply.

　　---Oh, that was probably _________ I was seeing the doctor.

　　A. when B. why C. what D. that

　　34. I kept this picture ________ I can see it every day as it reminds me of my university days.

　　A. in which B. where C. when D. whether

　　35. ---I can’t find Mr. Smith .Where did you last see him this morning?

　　---It was in the hotel _______ he stayed.

　　A. that B. where C. which D. since

　　36. You should keep those old jam bottles ----you never know ______ you might need them.

　　A. when B. how. C. what D .where

　　37. ---Do you have anything in mind ______you’d like for supper ?

　　---Well, ______will do for me.

　　A. which, everything B. that, anything

　　C. what, whatever D. that, either

　　38. After five hours’ drive, they reached _____ they thought was the place they’d been dreaming of .

　　A. that B. what C. which D. where

　　39. It is recommended that the project ___ until all the preparations have been made.

　　is not started B. not be started

　　C. will not be started D. is not to be started

　　40.______ has finished the work ahead of time will be rewarded though we don't know who it will be.

　　A. Those who B. Anyone C. Whoever D. No matter who