It is exactly he often fails in the exam makes his parents worried about him.A. what; th

问题补充：

It is exactly he often fails in the exam makes his parents worried about him.

A. what; that

B. that; which

C. that; that

D. what; what

答案：

A. what; that

B. that; which

(答案→)C. that; that

D. what; what

解析：考查强调句和主语从句。第一格是主语从句，因为从句中不缺少任何成分，故用That引导；第二格是强调句的后半部分。