---David，is that man your Chinese teacher?

---It___________ be him．He’s having a meeting．

A．mustn’t B．can’t

C．needn’t D．won’t

答案：

B 【解析】试题分析：句意:-David，那个人是你的语文老师吗？-不可能是他，他正在开会。mustn’t 禁止，不要；can’t 不可能，表示推测；needn’t 不需要，没有必要；won’t 不会，不愿意。根据句意可知，David的老师正在开会，所以那个人不可能是他的老师。故选B。考点：考查情态动词。

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