Is that the farm which you told me the other day?

这是你前几天告诉我的那个农场吗?这是一个定语从句,先行词是the farm, 引导词是which. 在从句中做宾语,这是一般疑问句,转换成陈述句应该是 That is the farm which you told me the other day!（这是你前几天告诉我的那个农场）.