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题目
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I really don"t know how to thank you, but for your help, I ________ my lost necklace.
A.couldn"t have foundB.mustn"t have found
C.couldn"t findD.wouldn"t find

答案
A
解析
A 句意:我真的不知道该怎样感谢你,没有你的帮助,我不可能找到我丢失的项链。couldn"t have done表示对过去情况的否定推测,意为“不可能”。
核心考点
试题【 I really don"t know how to thank you, but for your help, I ________ my lost nec】;主要考察你对虚拟语气等知识点的理解。[详细]
举一反三
Without the development of the Internet, Taobao and Tmall______$ 5.7 billion in sales on 11 November, 2013.
A.wouldn"t makeB.didn"t makeC.hadn"t madeD.wouldn"t have made

题型:不详难度:| 查看答案
Frankly speaking, I"d rather you________anything about it for the time being.
A.have doneB.haven"t done
C.don"t doD.didn"t do

题型:不详难度:| 查看答案
We________John"s name on the race list yesterday but for his recent injury.
A.will putB.will have put
C.would putD.would have put

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The space suits can be adjusted so that the team can reproduce different levels of gravity as if they________in space.
A.are B.has been
C.were D.had been

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(2014·蜀光中学月考)The weather turned out to be fine yesterday.I________the trouble to carry the umbrella with me.
A.couldn’t have taken B.mustn’t have taken
C.needn’t have taken D.didn’t need to take

题型:不详难度:| 查看答案
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