Question

这一题到底是选B，还是选C，怎么两种答案都有啊

That evening, ___ I will tell youmore about later, I ended up working very late.
A. that B.which C. what D. when

Answer 1

B

你把句子分成两句就很清楚：

1. That evening, I ended up working very late.

2. I will tell you more about that evening.  (tell sb about sth)

   that evening 为about的介词宾语，在非限制性定语从句中，用which.

   100%正确，采纳为盼！祝你进步！

Answer 2

原句= I will tell you more about that evening later。 I ended up working very late that evening.
这是定语从句 ，定语从句中缺少宾语（that evening），所以用which
选项C 不能引导定语从句 故错。

Answer 3

B

That evening, I ended up working very late.

I will tell you more about which (/that evening).