It remains whether the students will benefit from the monthly exams.A. seeingB. to be see

问题补充：

It remains whether the students will benefit from the monthly exams.

A. seeing

B. to be seen

C. to see

D. to have seen

答案：

A. seeing

(答案→)B. to be seen

C. to see

D. to have seen

解析：It remains to be seen (whether/what/how)以后才知道；尚不确定。选B.