[题目]Is this his key? No, . 题目和参考答案——青夏教育精英家教网—

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【题目】Is this his key?（作否定回答） No, .

【答案】it；isn't
【解析】含有系动词be一般疑问句的否定回答，No,主语+be+not。原句的主语不是人称代词时，要把主语变为其相应的人称代词，此处this应改为it，所以答案是：it isn't。

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A. for B. or C. but D. so

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