【題目】A mistake ______ have been made on our bill. We didn’t order any fish today.

A. shouldB. wouldC. mustD. can

【答案】C

【解析】

句意：我們的帳單一定弄錯了。我們今天沒點魚肉。

A. should應該；B. would會，將；C. must必須；一定；D. can能，會。根據(jù)下文We didn’t order any fish today.可知這里是一定已經(jīng)出錯了，must have done表示一定已經(jīng)做了……。根據(jù)題意，故選C。

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