–What was your brother doing at this time yesterday?–He was reading a magazine I was writ

问题补充：

–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：

A. as soon as

B. after

C. until

(答案→)D. while

解析：考查连词的用法。 as soon as“一……就……”； after“在……之后”； until“直到……”；

while“当……时候，和……同时”。由答语“他在读杂志而我在写电子邮件”可知，两个动作同时进行，故选D。