【題目】He _______ in his office. I phoned to his office just now, but no one answered.

A. may be B. can’t be C. mustn’t be D. needn’t be

【答案】B

【解析】句意:他不可能在他的辦公室里,我剛才給他的辦公室打電話(huà)了,但是沒(méi)有人接電話(huà)。may be可能是;can't be不可能;mustn't be禁止;needn't be沒(méi)有必要。根據(jù)句意可知,這句話(huà)表示推測(cè),應(yīng)表示否定的意思,must表示推測(cè)的時(shí)候,不能用于否定句,應(yīng)用can't。故選B。

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