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 查看更多

 

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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

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