—Do you know where David is?I couldn’t find him anywhere．
一Well，he__________have gone far—his coat’s still here．

A．won’t

B．mustn’t

C．needn’t

D．couldn’t

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答案解析

句意：——你知道大卫去哪儿了吗?我到处都找不到他。——他一定没有走远，他的外套还在这儿。本题考查的是对过去发生的事情的猜测。故D正确。
【知识拓展】needn’t have done本来不需要做某事却做了(对过去的虚拟)
must have done一定做过某事
can／might／could／may have done本可能做某事
couldn’t have done只能表推测，相当于Can’t have done。意为“过去不可能做了某事”。

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—Do you know where David is?I couldn’t find him anywhere． 一Well，he__________have gone far—his coat’s still here．

参考答案

答案解析

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