一、
二、1、——What are they doing？
——They are playing basketball
2、——What are the cows doing？
——They are drinking water
3、——What is the rabbit doing？
——It’s jumping
4、——What are they doing？
——They are playing hide-and-seek
5、——What is the girl doing？
——She is singing
三、1、sheep is
2、where
3、Are，drinking