This pen( )his； he was not here in the morni_MBA考试题库

单选题This pen( )his； he was not here in the morning.
A 、mustn't be
B 、cannot be
C 、should not be
D 、may not be

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参考答案

【正确答案：B】

【译文】这支钢笔不可能是他的，因为今天早上他不在这里。
【解析】根据分号后面he was not here in the morning可以看出前一分句是“有根据的否定推断”，因此考生须用语气最强的否定推断形式"can not be (不可能）”，故选B。
A项must常用于“有根据的肯定推断”，语气强烈，其对应的否定形式是“can not",而非mustn't； C项和D项都可用于表示“推测”，但都不是“有根据的”推断，不能与下文分号后面的语境形成对应。

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