Question

【题目】See the flag on the top of the building. That was we did this morning.

A. when

B. which

C. where

D. what

Answer 1

【答案】D

【解析】句意：看见大楼顶部的旗子了吧。那挪就是我们今天早上做的事情。what引导表语从句，且且在表语从句中作did的宾语。