—It is he often fails in exams makes his parents worried about him.
—So, he has to work whole-heartedly.
A. what, that
B. that, what
C. that, that
D. /, that
网友回答
A. what, that
B. that, what
(答案→)C. that, that
D. /, that
解析：主要测试主语从句。首先可以从语境中得知句中的第二空主要测试强调句型：it is。。。That。。。结合所学判断强调句型的方法可以把以上结构去掉，而且句子成立。剩余句子 he often fails in exams makes his parents worried about him中仍存在两套主谓结构，因此需要一个连接词，所以选择that。译文：------的确是他在测试中总失败让他的父母为他担心。------的确如此，他应该全力以赴的学习了。