题目内容
________ students in the classroom ______ twenty. The others are in the library.
| A．The number of ; is | B．A number of; are |
| C．The number of; are | D．A number of ; is |
A
解析试题分析：句意：教室里学生的数量是20.其他人在图书馆。the number of...的数量，做主语时谓语动词用单数；a number of一些，做主语时谓语动词用复数。故选A。
考点: 考查主谓一致。
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