Simon was looking for some information on the Internet while Daniel _______ with Millie. A.is talking B.was talking C.talk D.talked

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Simon was looking for some information on the Internet while Daniel _______ with Millie. A.is talking       B.was talking     C.talk           D.talked

Simon was looking for some information on the Internet while Daniel _______ with Millie. A.is talking B.was talking C.talk D.talked
Simon was looking for some information on the Internet while Daniel _______ with Millie.
 A.is talking       B.was talking     C.talk           D.talked

Simon was looking for some information on the Internet while Daniel _______ with Millie. A.is talking B.was talking C.talk D.talked
B
Simon正在做某事时,while当时 ,Daniel和Millie也正在做某事.

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。

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