【題目】It was 1897________ a European chemist called Dr. Felix Hoffman produced aspirin from this chemical.

A. that B. while C. when D. in which

【答案】C

【解析】

試題分析：考查定語從句。句意：那是一位歐洲的名叫Felix Hoffman的博士藥劑師從這種藥品中制造出阿司匹林的1897年�？蘸蟮亩ㄕZ從句缺少時間狀語，while不可以引導定語從句；若看作強調(diào)句型，則1897前應用介詞in。故可知選C項。

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