【題目】--Look! The man welcoming us at the school gate be our headmaster．

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

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

【答案】A

【解析】句意：——看！在學(xué)校門口歡迎我們的人一定是我們的校長(zhǎng)。——不，不可能是他。他現(xiàn)在正在辦公室開會(huì)。must表示推測(cè)時(shí)，用在肯定句中，意思是“一定”，can’t也可以表示推測(cè)，用在否定句中，意思是“不可能”，can可以，能夠，mustn’t禁止，千萬別。結(jié)合語境理解可知，兩個(gè)空處的單詞都是表示推測(cè)，前一個(gè)表示肯定的推測(cè)，后一個(gè)表示否定的推測(cè)，故答案為A。

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