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    精英家教网 > 初中英语 > 题目详情

    【题目】 I ________ know his telephone number.

    A. isn’t B. don’t C. am not

    【答案】B

    【解析】

    试题分析：句意：我不知道他的电话号码。因为know是实意动词，所以变成否定句时，应该加助动词do的适当形式。故选B。

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