I went to a friend's farm in the countryside with [my friend

为你解答.
I went to a friend's farm in the countryside with [my friend]. （对[ ]中的字词提问）
Who did you go to a friend's farm in the countryside?
你和谁一起去乡下一个朋友的农场的?
解释：因为疑问词who在句中是做宾语,也可以填whom.