8. You were kind enough to water the flowers every day　 while I was away,but you________ it.

　　　 A. mustn't have done　　 B. wouldn't have done

C. didn't have to do　　 D. mightn't have done

答案：C　 指导：说明事实上不需要做这件事情。

7. --Didn't you explain it to the boss?

　 --The boss stormed out of the garage before I________ get in a word.

　　　 A. would　　　　　　　　 B. could

C. dared　　　　　　　　 D. might

答案： B　 指导：全句意为“我还没能够插上话，老板就气愤地冲出了车库。”表明自己未能做到。

6.Your mother was really anxious about you. You ________home without a word.

　　　 A. needn't leave　　　　 B. mustn't leave

C. couldn't have left　　 D. shouldn't have left

答案：D　 指导：根据题意可以看出，此处是表示对发生过的事情的一种责备，意为“本不该做某事而实际上做过了”。

5. You didn't hear me until now?

　　 --No, I must________soundly when you came in.

　　　 A. have been sleeping　　 B. have slept

C. be sleeping　　　　 　　D. sleep

答案：A　 指导：说明对方进来时自己一定在睡觉，C项不能表示对过去情况的推测。

4.　 I'm told that John had another car accident this morning.

　　 --I believe not. He________so careless.

　　 A. shouldn't have been　 B. wouldn't have been

C. couldn't have been　　 D. mustn't have been

答案：C　 指导：根据题意看出，此处表示对发生过的事进行否定推测，D项的形式不存在。A项意为“本来不应该”，B项意为“本来不会”，表明他实际上是粗心了，意义皆不正确。

3. --We expected you yesterday.

　 --I'm sorry, I________you to say that I couldn't be here　 until today.

　　 A. must have claaed

　　 B. would be calling

　　 C. could have been calling

　　 D. should have called

答案：D指导：考查虚拟语气。Shouldhavedonesth表示“本应该做某事而事实上并未做”。

2. Among the 15-year-old children, some ________studying in university while others are still learning to read and　 write.

　　 A. should have been　　　 B. would have been

C. can be　　　　　　　　 D. must be

答案：C　 指导：可能正在做某事，can表示可能性。

1. Bob ________to Norfolk yet. He knows nothing about the place at all.

　　 A. can't have been　　　 B. mustn't have been

C. shouldn't have been　 D. needn't have been

答案：A　 指导：过去一定没做过某事can’t／couldn’t+have+过去分词。

6. He looks hot and dry.

　 --So________ you if you had a temperature of 40℃

A. may　　 B. would　　 C. must　　 D. should

答案：B　 指导：so在句首的答语中用了倒装句式。＝You would　 look hot and dry too if you had a temperature of　 40℃．同时 由had可知用的是虚拟。

探究性命题综合测试

考场热身

5.-- I speak to Mr. Smith?

　 --He________come to the phone right now. He is busy.

　　 A. Can; won't　　　　　 B. Could; couldn't

C. May;can't　　　　　　 D. Shall;may not

答案：C　 指导：用may表示征求许可，用can't表示(因为忙)不能来。