Question

That evening, _____ I will tell you more about later, I ended up working very late.

A．that

B．which

C．what

D．when

Answer 1

B

这里that evening是先行词，其在定语从句中作介词about的宾语，所以用which。句意：以后我将和你谈起的那个晚上，我工作到了很晚。
【考点定位】考查非限制性定语从句的关系词。