It is he often fails in exam makes his parents worried about him.A. because thatB. that

问题补充：

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：

A. because, that

(答案→)B. that, that

C. 不填, that

D. what, that

解析：考查主语从句和强调句型。整个句子是强调句型，所以第二空用that引导；去掉it is…that,剩下 he often fails in exam makes his parents worried about him.

可知 he often fails in exam是主语从句，且从句不缺成分，所以用that引导。选B。