Simon was looking for some information on the Internet while Daniel _______ with Millie. A.is talking B.was talking C.talk D.talked
问题描述：
Simon was looking for some information on the Internet while Daniel _______ with Millie.
A.is talking B.was talking C.talk D.talked
答
b
Simon was looking for some information on the Internet while Daniel _____was talkng__ with Millie.
While当什么时，几乎是同时发生的，所以都用过去进行时
答
但他正在网上搜寻信息的时候，计算机系统突然发生了故障 当他在网上搜索信息的时候，电脑系统突然崩溃了。
答
B
Simon正在做某事时,while当时 ,Daniel和Millie也正在做某事.