[单选题]_____ to gain access to seats at college ______ the seniors are working hard.

A
That is;\
B
It is;that
C
What is;that
D
Which is;why
正确答案:B
题目解析
考查名词性从句的用法。此处it是形式主语,that the seniors are working hard是真正的主语从句。
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