It is _____ he often fails in exams ____
问题:
It is _____ he often fails in exams _____ makes his parents worried about him.
A.what; that
B.that; what
C.that; that
D./; that
It is _____ he often fails in exams _____ makes his parents worried about him.
A.what; that
B.that; what
C.that; that
D./; that