帮帮我这题吧!!
Yesterday when the old man______(crose)the street,he______(knock) down.
参考答案:Yesterday when the old man was crossing the street,he was knocked down
当他正在过马路的时候——被车撞了
Yesterday when the old man______(crose)the street,he______(knock) down.
参考答案:Yesterday when the old man was crossing the street,he was knocked down
当他正在过马路的时候——被车撞了