He ___________ unwisely, but he was at least trying to do something helpful.A．ma
题型：不详难度：来源：
He ___________ unwisely, but he was at least trying to do something helpful.| A．may have acted | B．must have acted | | C．should have acted | D．would act |
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答案
| A |
解析
试题分析：句意：他的行为也许不明智，但是他至少能够尝试做一些有帮助的事了。may have done可能已经做了；must have done一定做过某事；should have done应该应经做过某事； would done过去将要做。根据句意故选A。
点评：本题难度适中。情态动词是高中阶段的重要的语法项目，需要考生掌握它们的不同的语法及区别，尤其是情态动词的完成式表示对过去的推测，不同的情态动词推测的可能性大小上不同，需要考生理解它们的不同的语法。
即学即练：Why didn’t you tell me there was no meeting today ? I _____ all the way here through the heavy snow.
A. needn’t have drive
B. can’t have driven
C. mustn’t have driven
D. shouldn’t have driven
解析：A。句意：你为什么不告诉我今天没有会？我本来没必要冒着大雪开车跑这么多路。Needn’t have done表示本来没必要。答案为A。 |
举一反三
Mr. Baker, a number of students want to see you. _______ they wait here or outside?| A．Should | B．Will | C．Could | D．Shall |
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| If you ___ stick to the unrealistic approach, the worse result will be waiting for you not far ahead. |
—Why did you leave without a word of warning to John?
—But what _____ otherwise? He never listens to me.| A．could I have done | B．would I do | | C．must I have done | D．should I do |
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– How’s your new class teacher?
– We ______ ask for a better one. All my classmates love him so much.| A．shouldn’t | B．couldn’t | C．mustn’t | D．needn’t |
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---I think Helen is at home.
---No, she be at home, for she phoned me from the airport just five minutes ago.| A．mustn"t | B．needn"t | C．can"t | D．dared not |
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