问题补充：
After , she arrived a small village.
A. half an hours’ walk；at
B. fifty minutes’ walk；in
C. half an hour’s ride；at
D. ten day’s drive；at
答案：
A. half an hours’ walk；at
B. fifty minutes’ walk；in
(答案→)C. half an hour’s ride；at
D. ten day’s drive；at
解析：句意：半个小时的行程后,他来到了一个小村庄. half an hour’s ride, ten days’ drive应该这样表示,当数词大于一时,先把名词变成复数再加所有格.到达小地点用at结合句意，故选C
