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 ---Is Jack on duty today?

    ---It ________ be him. It's his turn tomorrow.

      A. mustn't         B. won't            C. can't            D. needn't

 

【答案】

 C

【分析】根据题意,回答应该是“不可能是他”。在情态动词表推测时,must不能用于否定句,will是有肯定含义(That’ll be the doctor now 现在准是医生来了。此时约等于must)D。含义不对

【高考考点】情态动词表推测

【易错点】:B. 是很多同学容题犯的一个错误。

【备考提示】:情态动词是每年的考点之一,也是学习的重点和难点。学习情态动词的最佳方法就是记住他们的含义、区别与联系。在解题的时候要正确理解句子含义,正确把握说话人的语气和态度。

 

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