4.The river through our city,which is about _________,is clean again.A.6000 metres long B.6000-metres-long C.6000-metre-long D.6000 metre long为什么?

问题描述:

4.The river through our city,which is about _________,is clean again.
A.6000 metres long B.6000-metres-long
C.6000-metre-long D.6000 metre long
为什么?

a是对滴。

选A

A.6000 metres long