【題目】—Is that your new math teacher Miss Li?

—It ________ be her. She has gone to Beijing for a meeting.

A. can’t B. mustn’t C. can D. must

【答案】A

【解析】句意：-那是你的新數(shù)學(xué)老師李老師嗎? —不可能是她。她去北京開會了。本題考察情態(tài)動詞表示猜測之意。A. can’t不可能，表示有把握的否定猜測；B. mustn’t不許，表示禁止性的語言；C. can 可能，表示不確定的肯定猜測；D. must一定，表示肯定有把握的猜測。根據(jù)后文She has gone to Beijing for a meeting.可知，對“那不是數(shù)學(xué)老師”的否定猜測，十分有把握。故選：A。

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