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【题目】 --Could you help me with some math problems?

--Sure. That’s _______ I’m here.

A. whether B. how C. when D. why

【答案】 D

【解析】

试题分析:考查表语从句;句意:你能帮我解决这个数学问题吗?是的,这就是为什么 来这的原因。根据语境可知选D项。

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