1-Listen! I think the telephone is ringing.
2-Mrs. Smoth is playing the piano in the hall.
3-Grandmother is having rest in her bedroom.
4-Be quiet, I am thinking.
5-Jane isn't working, she's reading a book.
6-I see that you're wearing your new skirt today.
7-Jack is not in his room, he's having a bath.
8-I'm waiting for my boss.
9-Who's making that terrible noise?- It's Roger. He's practising the violin.
10-I am busy, I'm writing a letter.
11-It's snowing, put on your coat.
12-The plane is flying at 3,000 metres.