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　　31. As usual, he put on a show as though his trip a great success.

　　A. had been B. has been C. were D. was

　　31.A.as though引导的与过去相反的虚拟。

　　32. Looking round the town, he felt as though he away for ages.

　　A. has been B. was C. is D. had been

　　32.D.felt是过去式，所以该句是由as though引导的与过去相反的虚拟。

　　33. John is so strongly built that he looks as if he as elephant.

　　A. lifts B. is lifting C. lifted D. could lift

　　33.D.as if引导的与现在事实相反的虚拟。

　　34. He described the town as if he it himself.

　　A. had seen B. has seen C. saw D. sees

　　34.A.as if引导的与过去相反的虚拟。

　　35. At that thought he shook himself, as though he from an evil dream.

　　A. woke B. wakes C. would wake D. had woke

　　35.C.

　　36. Most insurance agents would rather you anything about collecting claims until

　　they investigate the situation.

　　A. do B. don’t C. didn’t D. didn’t do

　　36.(D)would rather后接从句要求用虚拟语气，形式为过去式，表示对现在或将来的假设，或为过去完成式表示对过去的情况的假设。

　　37. Although most adopted persons want the right to know who their natural parents are, some who have found them wish that they the experience of meeting.

　　A. hadn’t B. didn’t have had C. hadn’t had D. hadn’t have

　　37.(C)who引导的定语从句中的现在完成时表示动作业已发生，所以主句中表示的虚拟是针对已经发生了的行为，所以应该用过去完成式表示对过去的虚拟。

　　38. It is important that the TOEFL office your registration.

　　A. will confirm B. confirm C. confirms D. must confirm

　　38.(B)

　　39. Without electronic computers, much of today’s advanced technology .

　　A. will not have been achieved B. have not been achieved

　　C. would not have been achieved D. had not been achieved

　　39.(C)这是一人含蓄虚拟条件句，通过介词短语without,表示潜在的一种假设，而主句中的情况也早已经发生，所以是对过去情况的一种假设，因此用would not have been achieved这一形式。

　　40. He told her to return the book in time so that others a chance to read it .

　　A. may have B. will have C. would have D. might have

　　40.(D)连so that引导的从句中要求用虚拟语气，表示一种假设，形式为might+动词原形。

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