The boys were walking down the street.(就画线部分提问) （

发布时间：2021-02-24 18:48:14

The boys were walking down the street.(就画线部分提问) （ ） （ ）the boys （ 划线部分为：walking down the street

网友回答

What were the boys doing 就谓语动词提问,就用此句型.
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