–Whatwasyourbrotherdoingatthistimeyesterday? –Hewasread...

问题详情：

–What was your brother doing at this time yesterday?

  –He was reading a magazine ________ I was writing an e-mail at home.

A. as soon as B. after     l      D. while

【回答】

D

知识点：连词

题型：选择题