3.6. Сhange the Indefinite tenses to the Continuous ones adding necessary adverbs or time attributives : 1. I prepare for examinations in the library.
2. He reads scientific journals.
3. My sister works at her thesis.
4. The students study new words at the lesson.
5. They have dinner at home.
6. The engine rotated with high speed.
7. They built a new metro line.
8. The car went in the opposite direction.
9. We discussed a very important problem.
10. The scientist spoke about the discovery.
11. They will listen to the lecture tomorrow.
12. Tomorrow we shall have a laboratory work.
13. The engineer will test the new equipment on Monday.
14. They will show a new TV program next week.
15. The plant will install the new safety system.

1. You look wonderful! -Yes, I had a good rest. 2. I think I have caught a cold. 3. The house is so quiet. Everybody left. 4. Where is yesterday's newspaper? - I threw it away. 5. I can not get home. I lost the key. 6. Help me. I cut my finger. 7. Margaret's leg in a cast. She broke it. 8. Now the ticket costs 3 rubles. Payment increased. 9. I have not seen my school friend since I left school. 10. I have not been in my hometown for three years 11. I've seen very few interesting films in the last five years. 12. I've been here since morning. 13. How many years have you been friends with him? 14. I have not been to the theater since the fall. 15. We have not met with him for ages. 16. I read many books since I started to learn English. 17. This actor has not played in performances since last winter. 18. I have not received any letters from my cousin for a long time. 19. He has not written anything new since. 20. I have not been there since

 Hi, I am Ray. My Dad is not a famous person or a national hero. But he is my hero! He is always fun. I can play-fight him and he doesn't mind. He isn't a person who won a championship or walked on the Moon or saved people in trouble but he is kind and clever and he is never bored to be with. My best days are the days that I spend with my father. He knows a lot about space exploration and the achievements of scientists. I like his stories about space expeditions and astronauts.Sometimes my friends join us to listen to his stories and I am proud of my Dad.