问题描述：
15 minutes walk和 15 minutes' walk哪个对?为什么?
--how far is it from your home to the school
--it's fifteen( ).
a.minute's on foot.b.minutes on foot.c.minutes' by foot.d.minutes' on foot
选哪一个?为什么?理由?
--how far is it from your home to the school
--it's fifteen( ).
a.minute's on foot.b.minutes on foot.c.minutes' by foot.d.minutes' on foot
选哪一个?为什么?理由?
问题解答：
我来补答展开全文阅读