1. As usual, he put on a show as though his trip______ a great success.
A. had been B. has been C. were D. was
解析:A.as though引導(dǎo)的與過去相反的虛擬。
2. Looking round the town, he felt as though he ______ away for ages.
A. has been B. was C. is D. had been
解析:D.felt是過去式,所以該句是由as though引導(dǎo)的與過去相反的虛擬。
3. John is so strongly built that he looks as if he ______ as elephant.
A. lifts B. is lifting C. lifted D. could lift
解析:D.as if引導(dǎo)的與現(xiàn)在事實(shí)相反的虛擬。
4. He described the town as if he ______ it himself.
A. had seen B. has seen C. saw D. sees
解析:A.as if引導(dǎo)的與過去相反的虛擬。
5. 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
解析:(D)would rather后接從句要求用虛擬語氣,形式為過去式,表示對(duì)現(xiàn)在或?qū)淼募僭O(shè),或?yàn)檫^去完成式表示對(duì)過去的情況的假設(shè)。6. 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
解析:(C)who引導(dǎo)的定語從句中的現(xiàn)在完成時(shí)表示動(dòng)作業(yè)已發(fā)生,所以主句中表示的虛擬是針對(duì)已經(jīng)發(fā)生了的行為,所以應(yīng)該用過去完成式表示對(duì)過去的虛擬。
7. 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
解析:(C)這是一人含蓄虛擬條件句,通過介詞短語without,表示潛在的一種假設(shè),而主句中的情況也早已經(jīng)發(fā)生,所以是對(duì)過去情況的一種假設(shè),因此用would not have been achieved這一形式。
8. 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
解析:(D)連so that引導(dǎo)的從句中要求用虛擬語氣,表示一種假設(shè),形式為might+動(dòng)詞原形。
9. It is time that the government ______ measures to protect the rare birds and animals.
A. takes B. took C. has taken D. taking
解析:(B)It is time that是一種要求從句用虛擬語氣的常見句型。虛擬語氣形式為動(dòng)詞的過去式。
10. He was very busy yesterday, otherwise he ______ to the meeting.
A. would come B. came C. would have come D. had come
解析:(C)otherwise用來表示一種含蓄的虛擬假設(shè),因?yàn)槭菍?duì)過去(yesterday)的情況的假設(shè),所以應(yīng)該用would have come形式。
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