问题补充:
The park is far from here. It’s about .
A. thirty minutes’ walk
B. thirty minute’s walk
C. thirty-minute’s walk
D. thirty-minutes’ walk
答案:
(答案→)A. thirty minutes’ walk
B. thirty minute’s walk
C. thirty-minute’s walk
D. thirty-minutes’ walk
解析:考查数词的用法。句意“公园离这里很远。步行大约30分钟。”数词+名词所有格可以作定语;复数名词要先加s再加“’”。例如,have an hour’s ride“骑车半个小时”。故选A。