two-year-old 与two years old有何区别这题应该怎么选,说明理由。The river through our city,which is about______,is clean again.A.6000 metres long B.6000-metre-long

问题描述:

two-year-old 与two years old有何区别
这题应该怎么选,说明理由。
The river through our city,which is about______,is clean again.
A.6000 metres long B.6000-metre-long

two-year-old 作定语,前置
two years old:表语,后置