—Is this your ruler？ —Yes， . A. this is ...

—Is this your ruler？

—Yes， .

A. this is B. it is C .it isn’t D. that is

B 【解析】试题分析：句意：-这是你的尺子吗？-是的，它是。this is这是……；it is它是；it isn’t它不是；that is那是……。一般疑问句中，回答Is this/that……的时候，不用this或that，而要用it。而且这里是一个肯定回答，故选B。考点：考查一般疑问句的回答。

考点分析：

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