问题
选择题
–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
C．until
D．while
答案
答案：D
题目分析：句意：--昨天这个时候，你的兄弟正在做什么？--当我在家正写一封电子邮件的时候，他正在读一本杂志。分析：两个动作同时进行，表示一个动作发生在另一个动作的期间，因此用while.故选 D