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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
A
考查虚拟语气。根据句中but for要不是,用虚拟语气,本题是对过去事实相反的虚拟语气,故用could have done,选A。
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