1. We need to decide how to celebrate your birthday,
2 You needn't to go to the shop. I have bought everything we need.
3. Pupils must wear uniforms at school. It's a rule!
4. They don't have to cook dinner. Mother has done it.
5. People mustn't cross the street when traffic lights are red!
6. You have to do morning exercises! It's very useful!
7. May I take your pen? I have lost my pen
8. My friend can't speak English, but he speaks French.
9. You shouldn't go out if you feel not very well.
10. I should to take my umbrella, it's raining
ответ:1. Where were you yesterday? — I was at home the whole day. — How strange. I rang you up at two o'clock, but nobody answered. — Oh, I was in the garden. I was reading your book and didn't hear the telephone.
2. What were you doing at five o'clock yesterday? — I was working in the library. — I was there, too, but I didn't see you.
3. Nina celebrated her birthday yesterday. Her room looked beautiful, there were many flowers in it. When I came in, somebody was playing the piano, two or three pairs were dancing.
4 Listen! Somebody is playing the piano.
5. I like music very much.
6. When I looked out of the window, it was raining heavily and people were hurring along the streets.
7. What were you doing at seven o'clock yesterday? — I was having supper.
8. When I came home yesterday, I saw that all my family were sitting round the table. Father was reading a letter from my uncle, who lives in Kiev.
9. Yesterday I was working at my English from five till seven.
10. It was raining the whole day yesterday.
11. Where is your sister now?— She is in her room. She is doing her homework.
12. He is brushing his teeth at the moment. He cleans them thoroughly morning and night.
13. Don't disturb her while she is sleeping.
14. You are talking nonsense. You never talk sense.
15. My mother is sitting in the sun-light now and I am setting the table.
Объяснение: