at the farm对吗?

at the farm 跟on the farm 有什么不同? 英语翻译是at a farm 还是on the farm 在农场上是on the farm还是in the farm还是at the farm? There is sheep on the farm 这句句子对吗 弱弱的问下on the farm 与on a farm及at a farm的区别? There are many cows at the farm同义句 Are there no animals at the farm?如何回答 you,at the farm,Were,yesterday怎排列 she regretted_____(sell) the farm at such a low price has he _____(arrive)at the farm on time my uncle works on a farm now. 什么用介词on 而不用at on the farm =at arrive on farm还是arrive at farm?