1.every morning Mr.Smith takes a ________to his office.

问题描述:

1.every morning Mr.Smith takes a ________to his office.
A.20minutes' walk B.20minute's walk C.20minutes walk D.20-minute walk
这里选D 为什么不能选A呢

every morning Mr.Smith takes a ________to his office.A.20minutes' walk B.20minute's walk C.20minutes walk D.20-minute walk这里选D 为什么不能选A呢?因为20-minute是作定语修饰walk.又如:a five-year-old bo...