What are Greens doing?----They are watching TV
What is our teacher doing?---He/She is reading a bookwe/play cardsthey/do their homework it/singWhat are you doing?---We are playing cardsWhat are they doing?---They are doing their homeworkWhat is it doing?---It is singing如果帮到你，请记得采纳，O(∩_∩)O谢谢