The people have to work hard__the farms.A at B in C on Dinto

问题描述:

The people have to work hard__the farms.A at B in C on Dinto

选C
on the farm 固定搭配 在农场上
on farm 固定搭配 在种田

C
固定词组:on the farm 在农场

选C 意思是 人们不得不在农场上努力工作
在农场上 用on