问题
选择题
It is _______ he often fails in exam_______ makes his parents worried about him. [ ]
A. because, that
B. that, that
C. 不填, that
D. what, that
答案
答案：B
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It is _______ he often fails in exam_______ makes his parents worried about him. [ ]
A. because, that
B. that, that
C. 不填, that
D. what, that
答案：B