Упражнение 2. Определите функцию инфинитива в следующих предложениях. 1. Russian scientists have developed special chemicals to convert liquid oil products into gel in few seconds.
2. This technology is very important to transport oil products and other cases.
3. To transform oil products into gel is very important.
4. This technology is very useful to store oil products since gel becomes fireproof.
5. The new chemicals are needed to make structural changes in hydrocarbons.

Hello (напиши имя друга),
Hello from Moscow! You wanted to know about my school.Well, I go to primary school. I like going to school. We go to Sun Street School in Moscow. Moscow is the capital city of Russia.My school is not very big but my class room is very big!
  I have got many subjects: Art, English, Maths, Music, PE and many others.
I'm good at reading but I am not good at spelling. I hate spelling tests.I enjoy doing Maths.
Do you like going to school?
Is your school big?
What are your favourite subjects?
Is there a computerclass in your school?
Write soon,
(и своё имя)

1. What countries have you entered into contracts for the last time? 2. We just discussed the terms of delivery. 3. With this company we never had trade. 4. — You have received our catalogs and price lists? Yes. — You have studied our catalogs? — No. 5. — Your firm has ever sold this company the mountain-mine equipment? Yes. We traded them two years ago. 6. Is this movie still going? — Yes, but I haven't seen it yet. 7. Secretary has brought the mail? No, not yet. 8. Your plant ever manufactured this equipment? 9. We just sent a firm response by Fax. 10. He never spent a vacation in Spain.

1. I know him for 5 years. 2. We haven't seen him since he left to Ukraine. 3. He was not in St. Petersburg in 1965. 4. — How many years have you been married? — 5 years. 5. I haven't seen him since he came back from France. 6. We have not received letters from him from last year. 7. We do not trade with this firm since 1995