The number of people invited to the party sixty but a number of them absent.A. were; was

问题补充：

The number of people invited to the party sixty, but a number of them absent.

A. were; was

B. was; was

C. was; were

D. were; were

答案：

A. were; was

B. was; was

(答案→)C. was; were

D. were; were

解析：：考查主谓一致。The number of…做主语时，谓语动词用单数；a number of修饰可数名词复数形式，做主语，谓语动词用复数。句意：被邀请来参加会议的人的数量是60.但是很多人都缺席了。故C正确。