It is he often fails in exams makes his parents worried about him.A. what thatB. that

问题补充：

It is he often fails in exams makes his parents worried about him.

A. what, that

B. that, what

C. that, that

D. /, that

答案：

A. what, that

B. that, what

(答案→)C. that, that

D. /, that

解析：考查名词性从句及强调句。第一个that引导主语从句，第二个that为强调句型。句意：他考试常常不及格让他父母很担心他。