for several miles to ( ) end,there was no house on either side of the roadA at B in C on D to 为什么

问题描述:

for several miles to ( ) end,there was no house on either side of the road
A at B in C on D to 为什么

the answer is C on.
on end连续地 延绵数英里,道路的两旁都没有房子。

The other passengers were very angry with her and told her to wait for her turn later