问题
选择题
It was only after he had read the papers ________ Mr.Gross realized the task before him was extremely difficult to complete. (2013·大纲全国，30)
A．when
B．that
C．which
D．what
答案
答案：B
答案：B
解析 句意为：直到他读了文件之后，格罗斯先生才意识到他面临的任务很难完成。本句为强调句型，强调了时间状语only after he had read the papers。根据强调句结构“It is/was＋被强调部分＋that＋剩余部分”可知选B项。