【題目】 --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】

試題分析：考查表語從句；句意：你能幫我解決這個數(shù)學(xué)問題嗎？是的，這就是為什么 來這的原因。根據(jù)語境可知選D項(xiàng)。

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