Question

【题目】一Do you know at this time last night?

一Sorry, I don't know.

A. what she is doing

B. what she was doing

C. what is she doing

D. what was she doing

Answer 1

【答案】B

【解析】句意：-你知道昨天晚上这个时候她在做什么吗？-对不起，我不知道。根据语义可知，本题需要know的宾语，也就是宾语从句，应用陈述句语序，所以排选项C、D。last night表明使用过去的某一时态，所以排除答案A。故选：B。