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。