The number of people invited()eighty,but a number of them()ab-sent for different reasons

问题描述:

The number of people invited()eighty,but a number of them()ab-sent for different reasons
为什么是 was were呢
求解释

the number of 意思是:……的数量,作主语时是单数,所以第一个空用 was .
a number of 意思是:许多,大量,是复数,所以第二个空用 were .