The number of people invited ( ) fifty,but a number or them ( ) absent for different reasons.

问题描述:

The number of people invited ( ) fifty,but a number or them ( ) absent for different reasons.
The number of people invited ( ) fifty,but a number or them ( ) absent for different reasons.
A were; was B was; was C was; were D were; were

C
the number of ……的数量,作主语时谓语动词用单数.
a number of 许多,作主语时谓语动词用复数.