【題目】—Look! The man at the gate _____be our teacher. He is always standing there every morning.

—No, it _______ be him. He is having a meeting in the office now.

A. must; can’t B. must; mustn’t C. can’t; can’t

【答案】A

【解析】

句意：—看!門口的那個(gè)人一定是我們的老師。他每天早上都站在那里。-不，不可能是他。他現(xiàn)在正在辦公室開會(huì)。根據(jù)句意可知，本題考察情態(tài)動(dòng)詞表示猜測(cè)之意。must一定，表示有把握的肯定的推測(cè); mustn’t不許，表示禁止，不表示推測(cè)；C. can’t不可能，表示有把握的否定的猜測(cè)。 第一個(gè)空，根據(jù)后文He is always standing there every morning可知，對(duì)“是我們老師”的推測(cè)十分有把握；第二個(gè)空，根據(jù)后文He is having a meeting in the office now.可知，對(duì)“不是他”的推測(cè)也很有把握。故選：A。

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