40. They considered ______ a computer, which was considered ________ a great help in their work.

　　　 A. to buy; to be　 B. buying; being 　 C. to buy; being　 　 D. buying; to be　　

39. Several weeks had gone by _______ I knew the painting was missing.　　

A. as　　 　　 B. since　　　　　 C. until　　　 D. before

38. Mr. Alexander doesn’t just write for fun; _______, writing is his bread and butter.　

A. at last　　　 B. in fact　　　　 C. in a word　　　　 D. as a result

37. He sent me an e-mail, ________ to get further information.　

　 A. hoped　　 B. to hope　 C. hoping　 D. hope

36. ---Mr. Smith must know a lot about Chinese history.　 　

---________. He has studied it for years.

　 A. So he does　　　 B. So does he　　 C. So he must　　　 D. Yes, he must

35. While watching television, ________.　　

　 A. the doorbell rang　　　　　　　　　　　　　　 B. the doorbell was rung

　 C. we heard the doorbell ring　　　　　　　　　　 D. we heard the doorbell rings

34. In our factory there are 2,000 workers, two thirds of _______ are women.　

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

33. Your decision will affect your future study in college and your future job _______.

　 A. as though　　　　 B. as if　　　　 C. as well　　　 D. as well as

32. Mr. Smith likes traveling _______; but his wife enjoys _______.　

A. by train; taking a taxi　　 B. on train; by taxi

C. by train; by taxi　　　　 D. on train; taking a taxi