How lucky he was! He ____ involved in the murder.

A．must have been     B．can have been      C．could have been    D．would have been

 

【答案】

C

【解析】

試題分析：句意：他好幸運啊！他本來是被牽扯進謀殺案的。could have been本能夠做某事，而實際沒有做，故選C

考點：情態(tài)動詞表虛擬

點評：情態(tài)動詞和完成時態(tài)一起表示虛擬，特別值得注意的是各個情態(tài)動詞的意思，must have done表示過去肯定做了某事，can have done表示本能夠做某事而實際未做，should have done表示本應該做某事而未做，need have done表示本有必要做某事而實際沒有做，注意沒有mustn’t have done 的形式。

 

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