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?

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Theyhaven''tlivedhereforverylong.Theycan''t_____manypeople.A.haveknownB.beknowingC.knowD.known请问是选A吗?如

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?
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?

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?
是A can't have done