Jawaban:

1. Why are you mending that old shirt?

2. Can I borrow your pen or are you using it at the moment?

3. She isn't working, she is swimming in the river

4. A: What is Tom doing now? B: He is cleaning his shoes

5. It is a lovely day. The sun is shining and the birds are singing

6. They aren't having a long conversation. I wonder what they are talking about

7. We are using this room because the air-conditioner in the room is broken

8. Ths children are very quiet. Go and see what they are doing.

9. I can't hear what you are saying. the traffic is making too much noise

10. A woman is waving from the attic and a fireman is going up a ladder to help her!