问题
选择题
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
答案：C
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。