5. 因为 date from 的意思是“自某时起存在至今”(＝have existed since)，它通常用于一般现在时，而不用过去时态(尽管其后接的总是表示过去的时间)。

但若所谈论的东西现在已不复存在，则可用一般过去时。如：

The church, which dated from the 13th century, was destroyed in an earthquake two years ago.　 那座教堂是13世纪建成的，两年前在一次地震中被毁了。

4. 上文说“他”变化很大，即“他”现在不是过去的那个样子了，故第一空填is，第二空填 was(其实第二空也可用 used to be)。

3. 这是由 but I don’t know whether he has finished it 这一句话的语境决定的，全句意为“史密斯先生去年在写一本书，但我不知道他现在是否写完了”。有的同学可能由于受 last year的影响而误选B。但若选B，则句子前半部分的意思则变为“史密斯先生去年写了一本书”，既然是“写了”，那么这与下文的“但我不知道他现在是否写完了”相矛盾。

2. 第一空应填 look, 因为这是祈使句的谓语；第二空应填 had，因为前一句说“看看时间吧”，这一看当然知道了现在很迟的情形，“不知道这么迟了”显然应是“过去”的事，故应用一般过去时态。

1. 第一个人说“我忘记他的电话号码了”，这个“忘记”应该是现在的情况，即现在忘记了，要不然就没有必要同对方说此话了，故第一空应填 forget；第二个人说“我有他的号码，但我忘记带电话本了”，这个“忘记”应该是过去的情况，即过去忘记带电话本，所以现在电话本不在身上(注意句中的转折连词 but)，故第二空应填 forgot，即答案选应C。

57. ―________ for Beijing? 　―Yes. And I’ll come back in three months. A. Have you left　　 B. Are you leaving C. Do you leave　　　 D. Did you leave 58. ―Why? Where is the key to the sound lab? 　　 ―Dear me! You _______ it in the taxi！ A. have never left　　 B. never left C. haven’t left　　　 D. didn’t leave 59. ―Was the doctor there when you arrived? 　　 ―Yes, but he ______ out a moment later. A. had gone　　　 B. has gone　　　 C. went　　　 D. is going 60. In warm weather fruit and meat ________ long. A. don’t keep　　　 B. can’t be kept C. are not kept　　 D. aren’t keeping

1-5 CCDCC　 6-10 CCCCB　 　11-15 BBDCC 　16-20 DDCAC

21-25 ACBCC 26-30 ACABA 　31-35 ABBDC 　36-40 DBCCB

41-45 DDCCC　 46-50 ACDAC 51-55 DCDBC 56-60 ABBCA

52. ―What about 10 o’clock tomorrow morning? 　　 ―I’m afraid I can’t make it. I _________ then. A. am going to take an exam　 B. am taking an exam C. will be taking an exam　　 D. an to take an exam 53. ―What’s the matter? You look worried and restless. 　　 ―Oh, nothing really serious. As a matter of fact, I ______ of my graduation thesis. I have to hand it in soon. A. am just thinking　　 B. just thought C. have just thought　　 D. was just thinking 54. ―Twenty dollars, please! 　 ― How terrible! I ________ to bring my wallet with me. A. was forgetting　　 B. forgot C. had forgotten　　　 D. am forgetting 55. My money_____, I must go to the bank to draw some of the savings out before I have none in hand. A. has run out　　　 B. has been run out C. is running out　 D. is being run out 56. ―What were you doing when I called you yesterday afternoon? 　　 ―I ________ my homework and I was starting to take a bath. A. had just finished　　 B. was finished C. have already finished　　 D. was going to finish

51. ―Do you have anything to do this afternoon? 　　 ―What’s up? 　　 ―Let’s go shopping. It’s said that Jinying Shop ______, and all the sweaters are sold at half price. 　 ―Why not? A. has closed down　　 B. was closing down C. closes down　　　　 D. is closing down

50．Hello. You ?　 68442936. I’m sorry I’m unable to answer your call right now.

A．reached　 B．are reaching 　　 C．have reached　　 D．had reached

49．I want to buy that kind of cloth because I _____ the cloth _____ well.

A．have been told; washes　　 B．have told; washes　　

　C．was told; washed　　 　　　 D．have been told; is washed