问题补充:
It was only after he had read the papersMr. Gross realized the task before him was extremely difficult to complete.
A. when
B. that
C. which
D. What
答案:
A. when
(答案→)B. that
C. which
D. What
解析:考查强调句型。only after he had read the papers是被强调的部分,Mr. Gross realized the task before him was extremely difficult to complete句子成分完整,排除C、D;把It was和that去掉后不影响句意,因此是强调句,故选B。
【考点定位】强调句型it is...that。
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