They haven't lived here for very long.They can't _____ many people.A.have knownB.be knowingC.knowD.known请问是选A吗?如果不是那选什么为什么?

分类: 作业答案 • 2021-12-19 11:44:22

问题描述：

They haven't lived here for very long.They can't _____ many people.
A.have known
B.be knowing
C.know
D.known
请问是选A吗?如果不是那选什么为什么?

答

是A can't have done