________ students in the classroom _____

试题详情及答案解析

________ 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

答案：A

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。