问题补充:
My school isn far from here. Its only walk.
A. fifteen minutes
B. fifteen minutes
C. fifteen minutes
D. fifteen minute
答案:
A. fifteen minutes
(答案→)B. fifteen minutes
C. fifteen minutes
D. fifteen minute
解析:一些表示时间、距离等的名词后面可加“-s”来表示所有格,以-s结尾的复数名词,其所有格只加“-”构成。