1. He was reading a book at five o'clock yesterday. 2. Will you go for a walk with me? — I am sorry, I can't. I am doing my homework. I haven’t written the English exercise yet. 3. Where do you usually take books for reading? 4. What was he doing when you saw him yesterday? 5. I have never heard of her. 6. This little boy has never seen a crocodile. 7. What are you reading now? — I am reading Tom's book. 8. Autumn has come. It is November now. It is getting colder, the days are getting shorter. It often rains. Soon it will be very cold. 9. Our students have done all kinds of exercises and now they are sure that they know this rule well. They hope they will make no mistakes in the paper.
2. chemists.
3. commercial.
4. marketing.
5. working.
6. generating.
7. developed.
8. developments.
9. successfully.
10. innovation.