【题目】你遛狗的时候不小心把狗松开了，它被一辆汽车撞了。
While the dog, you were careless and it got and was hit by a car.

【答案】walking；loose
【解析】Walk与其逻辑主语you之间是主动关系，所以用现在分词作时间状语；get loose固定短语，”松开了“，，所以填(1). walking, (2). loose。