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
网友回答
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。