【題目】This article deals with the extent ______ family life has changed over the past 30 years.

A. in which B. at which

C. to which D. on which

【答案】C

【解析】

試題分析：考查關(guān)系詞。句意：這篇文章主要講的是家庭生活在過去的30年里改變的程度。To the extent...的程度，固定搭配，故選C項。

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