Now ______ of students has reduced because ______ of students have graduated recently.

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问题 Now ______ of students has reduced because ______ of students have graduated recently.

选项 A、the number; number
B、number; a number
C、a number; the number
D、the number; a number

答案D

解析 句意:现在学生人数已经减少了,因为很多人已经毕业了。the number of sth.做主语时因为其中心词number为可数名词的单数形式,所以谓语动词要用单数形式;a number of后面接可数名词的复数形式做主语时,谓语动词要用复数。
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