问题描述：
It's only ____ from here to the Bund.
A.20 minutes ride B.20 minutes' ride
C.a 20 minutes ride D.a 20 minutes' ride
It's only about ____ from my home to the library.
A.ten-minutes-walk B.ten-minute-walk
C.ten minutes' walk D.ten minute's walk
为什么第一句前面加了a,第二句不用加a,是ride和walk的原因吗
A.20 minutes ride B.20 minutes' ride
C.a 20 minutes ride D.a 20 minutes' ride
It's only about ____ from my home to the library.
A.ten-minutes-walk B.ten-minute-walk
C.ten minutes' walk D.ten minute's walk
为什么第一句前面加了a,第二句不用加a,是ride和walk的原因吗
问题解答：
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