题目内容：

-Excuse me.How far is the post office from here?-It is about ----walk.
A.ten minute B.ten minutes
C.ten minutes's D.ten-minute
And why?

优质解答

D 连字符可将名词连接起来做复合修饰的定语
如 a 17-year-old girl;a three-leg chair.请注意此时采用单数形式