(2013·高考新课标全国卷Ⅱ)It was only after he had read the papers Mr.Gross realized the task before him was extremely difficult to plete.
A. when
B. that
C. which
D. what
网友回答
A. when
(答案→)B. that
C. which
D. what
解析：选B。题干的意思是：“直到他读了文件之后，格罗斯先生才意识到他面前的任务非常难完成。”本句为强调句型，强调状语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。此外，我们也可以将It is/was与空格去掉来验证此句是不是一个强调句。