1.
1 The boys are running about in the garden.
2 I am doing my homework.
3 John and his friends are going to the library.
4 An is sitting at her desk. She is studying geography.
5 A young man is standing at the window. He is smoking a cigarette.
6 The old man is walking about the room.
7 The dog is lying on the floor.
8 Are you having a break?
9 What language are you studying?
10 Who is lying on the sofa?
11 What are they talking about?
12 It is still raining.