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In my opinion, ______ seems easy at first often turns out to be difficult in the end.

A. it B. what C. that D. which

B

【解析】

试题分析:考查主语从句。句意:在我看来,刚开始看起来很简单的事情最后都会变得非常的困难。What引导主语从句,在从句中做主语,故选B项。

考点 : 考查主语从句

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