题目内容

【题目】It was only after she had read the papers _______ Mary realized the homework before her was extremely difficult to complete.

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

【答案】B

【解析】

试题分析:本句为强调句。强调句的结构:It is/was+被强调部分+that....;本句中被强调的部分是时间状语从句only after she had read the papers,故空缺处要填that,故选B。

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