i am not happy because i found my mother _______ my things yester_英语解答

i am not happy because i found my mother _______ my things yesterday
A looking though
B is looking though
C was looking
D looked for
该选哪个?为什么?

人气：299 ℃　时间：2020-03-22 11:00:25

解答

A
分词作状语为什么不选B？因为前面已有谓语动词FOUND
另外，主句是一般过去时FOUND，从句要用相应的过去时（ B 是现在进行时）