问题
选择题
(2013·新课标Ⅱ，10)It was only after he had read the papers________Mr.Gross realized the task before him was extremely difficult to complete.
A．when
B．that
C．which
D．what
答案
答案：B
考查强调句。题干可还原为：Mr.Gross realized the task before him was extremely difficult to complete only after he had read the papers，即可判断为强调句，因此填that。