I ----- to your party,but I didn't have time.A.would have co

你是正确的,应该是A
==If I had had time,I would have come to your party.(这是最好的证明方法,show it to your teacher .看来,你们老师的变通能力不行,还有他的英语思维不到位,只会根据所给答案上课.)
再问： 我也这么觉得，但现在我还不能确定。如果确定了咱是对的，我就给你分
再答： 放心吧，我是吃英语饭的。Good day to you.