Where could she ______ the key? I couldn’t find anywhere.A、putB、have putC、has

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问题 Where could she ______ the key? I couldn’t find anywhere.

选项 A、put
B、have put
C、has put
D、had put

答案 B

解析根据后半句"couldn’t find"可判断，放钥匙的动作发生在"find"之前。"could have done sth."表示"有可能(会)做某事"，是对过去发生的行为的一种推测。

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Wherecouldshe______thekey?Icouldn’tfindanywhere.A、putB、haveputC、has