45. The World Wide Web is sometimes jokingly called the World Wide Wait because it _________be very slow.

　　　 A．should　　　　　　　　 B．must 　　　　　　　　 C．will　　　　　　 D．can

44. I have lost one of my gloves. I ________ it somewhere.　

　A. must drop B. must have dropped

　C. must be dropping D.must have been dropped

43. --- Tom graduated from college at a very young age.

　 --- Oh, he______ have been a very smart boy then.　

　　　 A could　　　　　　　　　　 B should　　　　　　　　　 C might　　　　　　　　　　 D must

42. You ______ be tired---you’ve only been working for an hour.　

　　　 A must not　　　　　　　　 B won’t be　　　　　　　　 C can’t　　　　　　　　　　 D may not

40. - Is John coming by train? 　 - He should, but he _________ not. He likes driving his car.　 　 A．must　　　 B．can　　　　　 C．need　　　　 D．may 41. ― I heard they went skiing in the mountains last winter.

― It ______ true because there was little snow there.　

　　　 A. may not be　　　　　　　 B. won’t be　　　　　　　　　 C. couldn’t be　　　　　　　 D. mustn’t be

39. Sorry I'm late. I ________ have turned off the alarm clock and gone back to sleep again.

　A. might 　　B. should 　　　C. can 　　　D. will

38．He made a mistake,but then he corrected the situation　　　 　it got worse.

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

37．When and where to go for the on-salary holiday ______ yet.

A. are not decided　　　　　 B. have not been decided

C. is not being decided　　　 D. has not been decided

36. ----Can I help you, sir?

----I’d like to buy a TV set.

----This way, please. We have many types for you ____ .

A. to choose　 　B. to choose from　 　C. to choose　 　D. to buy

35. ----Oh, it’s you! I ___ you.

　 ----I’ve just had my hair cut, and I’m wearing new glasses.

A. don’t recognize　　 　　　　　B. didn’t recognize

C. hadn’t recognized　 　　　　　D. haven’t recognized