It is said that the number of doctors invited to the meeting 100 but a number of them ab

问题补充：

It is said that the number of doctors invited to the meeting 100, but a number of them absent for different reasons.

A. is; were

B. is; was

C. are; were

D. are; was

答案：

(答案→)A. is; were

B. is; was

C. are; were

D. are; was

解析：考查主谓一致。The number of…的数量；该短语做主语，谓语动词用单数形式；a number of 许多，修饰可数名词复数形式，做主语，谓语动词用复数。句意：据说被邀请来参加会议的医生的数量是100人，但是很多人因为各种原因都缺席了。故A正确。