I___ some shopping with my mother when I ran into Linda.为什么要填did,而不填was doing.

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I___ some shopping with my mother when I ran into Linda.为什么要填did,而不填was doing.
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I___ some shopping with my mother when I ran into Linda.为什么要填did,而不填was doing.
I___ some shopping with my mother when I ran into Linda.
为什么要填did,而不填was doing.

I___ some shopping with my mother when I ran into Linda.为什么要填did,而不填was doing.
我觉得还是填was doing啊
When从句表示的当……的时候,用的是过去式,所以前面应该用Was doing吧

was doing 加shopping 就可以了,这里是some shopping ,意思是买了些东西,所以是过去的动作,用did

我这有这试卷啊,答案是was doing when ,你的答案错了吧。