一、题目略
1.eating 2.drinking
3.jumping 4.sleeping
二、题目略
1.are; doing
2.am playing
3.your father doing
4.mine
5.ours
6.theirs
三、1.flying 2.fly 3.climbing 4.climb 5.swimming 6.swim
四、1.playing football 2.flying a kite 3.Walking