He ____ writing the paper now. He hadn’t written a single word when I left him ten minutes ago.

  A. shouldn’t be      B. can’t have finished

  C. can’t be          D. mustn’t have finished

B


解析:

查情態(tài)動(dòng)詞。“can’t have + 過去分詞”表示對過去情況的可能性推測，此處意為“不可能已完成”。

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A．signal B．pride C．successD．expectation
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