1. Where are they? 括号内in the zoo是地点,提问地点用where
2. Who are sweeping the floor? 括号内we是人,做主语,用who提问
3. What is it? 括号内a circle是物,做主语,用what提问
4. Who are they? 同2
5. Where are you going? 括号内Beijing是地点,用where提问,这时省略to
6. Who is listening to music?括号内I是指人,做主语,用who提问,这时不确定第几人称,所以am要改成is
1.Where are they?
2.Who are sweeping the floor?
3.What is it?
4.Who are they?
5.Where are you going ?
6.Who is listening to music?
【俊狼猎英】团队为您解答。