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.because;that.
It is ________ he often fails in exams ________ makes his parents worried about him.
A.what;that. | B.that;what. | C.that;that. | D.because;that. |
参考答案: