Tom ____ be ill, for I saw him playing basketball an hour ago.

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

 

C

【解析】

試題分析：考查情態(tài)動(dòng)詞。句意：湯姆不可能生病了，因?yàn)槲乙恍r(shí)前還看到他在打籃球。情態(tài)動(dòng)詞表允許，也可以表示推測(cè)。表推測(cè)時(shí)，must意為“一定”，表示肯定推測(cè)，否定推測(cè)不能用mustn’t，mustn’t意為“禁止”；否定推測(cè)用can’t“不可能”，may not意為“可能不”。故選C。

考點(diǎn)：考查情態(tài)動(dòng)詞

 

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