Anyway ,that evening _______I will tell you more about later, I ended up staying at Rachel's place .
A. when B. where C. what D. which

选D,which.
还是定语从句。先行词是that evening,在定语从句中是介词about的宾语，所以要选which. that evening是后面主句的时间状语，本来应该是 in that evening, 但前面的in可以省略。

end up的意思不是"结束". end up是一个联系动词，意思是：结果是...。例如：We didn't like it first, but we ended up cheering.


翻译：
总之,那个晚上我只好呆在Rachel那里。关于那个晚上的事，我以后再详细告诉你。