【題目】There is no simple answer, ________ is often the case in science.

A. as B. that

C. when D. where

【答案】A

【解析】

試題分析：考查定語從句。句意：沒有簡單的答案，就像科學(xué)一樣。as引導(dǎo)非限制性定語從句；as is often the case，意思是“情況常常如此”。

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