While Mike _______ for his dog, he fell into a river._刷题宝

题干

While Mike _______ for his dog, he fell into a river.

A：looked

B：was looking

C：would look

D：was looked

上一题下一题 0.0难度选择题更新时间:2019-09-14 11:02:08

答案(点此获取答案解析）

B

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