单选题
"Why is the university doing so much building?"
"The number of students ______ that there aren't enough classrooms."
A、
have increased so rapidly
B、
has increased so rapid
C、
have increased so rapid
D、
has increased so rapidly
【正确答案】
D
【答案解析】
主谓一致。The number作主语，应用单数谓语动词。B不可选择，因为increase需用副词rapidly修饰。
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