Fill in the gaps with should, have to, must. 1. The plane takes off at 12.00, so I go now.
2. Everybody in this company wear the uniform.
3. I be a good son for my parents.
4. You find a job.
5. You go there by train.
6. I get up early today. I want to do my job.
7. I stop smoking.

Why do people read books? It's quite a difficult question, and each of us could answered in different ways to it.

People read books since had been writting the first book. It happened many of years ago. In ancientness, people read books for new information, books it was something "not for all", because not every person could read. Other pupils found "readers" (people which can, and know how to read) very smart and respected them.

Books play a significant role nowadays. Even in modern technological era importance doesn't disappear. It helps us all the time, mostly every day. Without books, that others brought and gave to us in childhood we even would not know what it this - "book". We was learning with its help in school for about ten years, and use it now.

There are a lot of wonderful reasons why reading is important. For example is improve your imagination, understanding and memory, reduce stress, entertain oneself. 

Books is a necessary part of our life. It helps relax, teaches us and gives a pleasure. Many of people finds answers for own questions in book. Or it help to deal with some situation. And even maybe will save our lifes.

10. What were you doing when I came in?
11. He had been teaching at school for five years when the war broke out.
12. Hi! What have you been doing here since morning?
13. By the end of this year he will have read about two hundred pages.
14. When did you see him last?
15. Don’t ring me up at 11 o’clock, I will be sleeping.
16. ‘Have you found your note-book?’ ‘No! I am still looking for it. I have already been looking for it for two hours, but have not found it yet.’
17. They had been sailing down the river for many hours before they came to the village.
18. At last the librarian gave me the book which I had been waiting for during two months.
19. He had been writing  the composition for three hours and he said he would finish it soon.
20. On entering the drawing-room he found that his two friends had got up and were waiting for him.