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

21.The letter is from my sister, ______is working in Beijing.

A. which B. that C. whom D. who

22.In our factory there are 2,000 workers, two thirds of ____are women.

A. them B. which C. whom D. who

23.You're the only person ______I've ever met ______could do it.

A. who;/ B./; whom C. whom;/ D./; who

24.I lost a book, ______I can't remember now.

A. whose title B. its title C. the title of it D. the title of that

25.Last summer we visited the West Lake, ______Hangzhou is famous in the world.

A. for which B. for that C. in which D. what

26.I have bought such a watch _______ was advertised on TV.

A. that B. which C. as D. it

27.I can never forget the day _______ we worked together and the day ______ we spent together.

A. when; which B. which; when C. what; that D. on which; when

28.The way ______he looks at problems is wrong.

A. which B. whose C. what D./

29.This is the reason ______he didn't come to the meeting.

A. in which B. with which C. that D. for which

30.This machine, ______for many years, is still working perfectly.

A. after which I have looked B. which I have looked after

C. that I have looked after D. I have looked after

31.The reason ______he didn't come was ______he was ill.

A. why; that B.that;why C. for that;that D.for which;what

32.He is working hard, ______will make him pass the final exam.

A.that B.which C.for which D.who

33.That is not the way ______I do it.

A./ B.which C.for which D.with which

34.I have two grammars, ______are of great use.

A. all of which B. either of which C. both of that D. both of which

35.I want to use the same tools _______used in your factory a few days ago.

A. as was B. which was C. as were D. which

36.My neigh bours used to give me a hand in time of trouble, _______ was very kind of them.

A. who B. which C. that D. it

37.This is the magazine _______ I copied the paragraph.

A. that B. which C. from that D. from which

38.He is not such a man _______ would leave his work half done.

A. that B. which C. who D. as

39. You can depend on whatever promise _______ he makes.

A. / B. why C. when D. whose

40. Smoking, _______ is a bad habit, is, however, popular.

A. that B. which C. it D. though

41. --- Did you ask the guard _______ happened?