一.
1,Sally is chasing his mother.
2.Hans is opening a window.
3.Tim is cleaning a room.
4.Jones is making a bed.
5.My grandfather is reading a newspaper.
6.The old man is cleaning his teeth.
7.The little girl is closing a door.
8.My sister is watching a picture.
9.Emma is cooking.
二.
1.climbing
2.swimming
3.doing
4.sitting
5.sharpening
三.
1.He is opening the window.
2.Tim is reading a magazine.
3.Tom is putting on his skirt.
4.She is climbing the tree.
5.The dog is drinking its milk.