This is a good way to keep____teachers and students happy

问题描述:

This is a good way to keep____teachers and students happy
A.either B.none C.all D.both
both and固定词组 但是老师和学生都是复数,还属于2者吗?

这里的两者是两个大的方面(即可以指2个个体也可以指2个整体)
Do you understand?