The pople there( )working hard.A.aren't B.isn't C.don't

问题描述:

The pople there( )working hard.A.aren't B.isn't C.don't
请问选择哪一个?

A
people是复数形式,排除B,再者,后面是working,前面要加be动词,助动词do不可以跟动词ing连在一起.