Ответ:
1. You mustn't smoke cigarettes. 2. How many people are there? 3. You don't have to eat boring food. 4. What about going to that new pizzeria? 5. There areа lot of children in this school.
Task 2
1. Next summer we (will visit) my cousin in California.
2. I (have not done) my homework today.
3. Yesterday I (did not go) to school.
4. In the year 2100 people (will live) on Mars.
5. I think you (will be) famous!
6. (Have you finished) the washing-up?
7. Last year I (started) to learn English.
8. Next weekend Paul (will have) а party.
9. "Where is Cheryl?" "She (is having) lunch."
10. (Have you ever been) to London?