4.Conditional sentences (Past). You have to put the verb into the correct form. 1) If I (know) that you were ill last week, I`d have gone to see you.

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Since ancient times Nature has served Man, being the source of his life. For thousands of years people lived in harmony with environment and it seemed to them that natural riches were unlimited. But with the development of civilization man's interference in nature began to increase.

Large cities with thousands of smoky industrial enterprises appear all over the world today. The by-products of their activity pollute the air we breathe, the water we drink, the land we grow grain and vegetables on.

Every year world industry pollutes the atmosphere with about 1000 million tons of dust and other harmful substances. Many cities suffer from smog. Vast forests are cut and burn in fire. Their disappearance upsets the oxygen balance. As a result some rare species of animals, birds, fish and plants disappear forever, a number of rivers and lakes dry up.

The pollution of air and the world's ocean, destruction of the ozone layer is the result of man's careless interaction with nature, a sign of the ecological crises.

The most horrible ecological disaster befell Ukraine and its people after the Chernobyl tragedy in April 1986. About 18 percent of the territory of Byelarus were also polluted with radioactive substances. A great damage has been done to the agriculture, forests and people's health. The consequences of this explosion at the atomic power-station are tragic for the Ukrainian, Byelorussian and other nations.

Environmental protection is of a universal concern. That is why serious measures to create a system of ecological security should be taken.

Some progress has been already made in this direction. As many as 159 countries — members of the UNO — have set up environmental protection agencies. Numerous conferences have been held by these agencies to discuss problems facing ecologically poor regions including the Aral Sea, the South Urals, Kuzbass, Donbass, Semipalatinsk and Chernobyl.

An international environmental research centre has been set up on Lake Baikal. The international organisation Greenpeace is also doing much to preserve the environment.

But these are only the initial steps and they must be carried onward to protect nature, to save life on the planet not only for the sake of the present but also for the future generations.

ответить на вопросы своими словами

1. How did people live for thousands of years?
2. What cities appear all over the world today?
3. What pollutes the air we breathe?
4. What is the result of the pollution the atmosphere?
5. Why is environmental protection of a universal concern?
6. What are the initial steps in this direction?

2. Martha _______________(find) a new job. She is starting next week. 3. When ______________Simon _______________(arrive) at the cinema yesterday? 4. John is a well-known artist. He ______________(paint) a lot of pictures. 5. John ________________(paint) his first picture in 1980. 6. Mike _______________(win) more than 20 medals when he was a sportsman. 7. I ________________(see) Sting last year. 8. I ______________(speak) to Celine Dion. 9. I _______________(write) 5 letters this week. 10. I ______________(read) this book a month ago. 11. He _______________(still/not/buy) a computer. 12. They ________________(yet/not/find) the way out. 13. _______________you ______________(write) this translation yet? Ex. 3. Put the verbs in brackets in the Present Simple, Present Continuous, Past Simple or Past Continuous 1. What ____________you ______________(look) at? –Some photos I __________(take) when I _____________(be) on holidays. 2. I _______________(be) sorry, but I ______________(not understand) what you _____________(mean). 3. What ___________Jane_____________(do)? – She ______________(be) a teacher, but she ______________(not teach) at the moment. 4. He never _____________(smoke) and ___________usually __________(not eat) meat. 5. Last time I _____________(go) abroad was when I ______________(go) to London. We _____________(stay) in London for three days. On the first day when I ______________(do) the sights, I _____________(meet) my old friend. He ___________just______________(go) to his hotel when we ___________(come) across. 6. ___________you ____________(often, go) to the gym? – I _______________(not go) much at the moment, I ____________(not have) time. I ____________(be) too busy these days. But I ___________(want) to go to the gym next week. 7. Tomorrow Kate _____________(visit) her aunt, that’s why now she _____________(make) a cake. It _____________(smell) delicious! When Kate ____________(visit) her aunt last week, she _______________(buy) some pastries from the baker’s, but they _____________(not be) that good.

Muriel's husband. 2 A: Are you doing anything tomorrow evening? B: Yes. I ...........................................(see) Jack at nine o'clock. 3 A: I..............................(see) you're feeling better. B: Yes, I am, thank you. 4 A: What's that noise? B: The people next door............................(have) a party. 5 A: Graham........................(have) a new computer. B: I know. I've already seen it. 6 A: This dress.......................................(not/fit) me any more. B: Why don't you buy a new one? 7 A: Your perfume ...............................(smell) nice. What is it? B: It's a new perfume called Sunshine. 8 A: What is Jane doing? B: She .................................(smell) the flowers in the garden. 9 A: What...........................................(you/look) at? B: Some photos I took during my holidays. They aren't very good, though. 10 A: You ............................(look) very pretty today. B: Thank you. I've just had my hair cut. 11 A: I ..........................(think) we're being followed. B: Don't be silly! It's just your imagination. 12 A: Is anything wrong? B: No. I ................................(just/think) about the party tonight. 13 A: This fabric ..................................(feel) like silk. B: It is silk, and it was very expensive. 14 A: What are you doing? B: I ..............................(feel) the radiator to see if it's getting warm. 15 A: She............................(be) generous, isn't she? B: Yes, she has never been a mean person. 16 A: He..................................(be) very quiet today, isn't he? B: Yes, I think he has some problems. 17 A: Would you like some cherries? B: Yes, please. I ...........................(love) cherries. They're my favourite fruit. 11 18 A: I'm sorry, but I ................................................... (not understand) what you mean. B: Shall I explain it again? 19 A: The children are making lots of noise today. B: I know, but they................................(have) fun. 20 A: This cake...................................(taste) awful. B: I think I forgot to put the sugar in it!

compo­sition atthree o'clock. It is already eleven, and he still (to write) it. He says he (to finish) it by twelve.

2. We (to help) our librarian to put the books in the right order for three days already, but we (to arrange) only half the books.

3. What you (to do) when I (to come) in?

4. When I (to come) to his house, they (to tell) me that he (to leave) an hour before.

5. On check­ing up his answers, he (to find) out that he (to make) several mistakes.

6. When I (to leave) home, the snow already (to stop), but a strong wind (to blow).

7. You (to read) this book? — Yes, I (to read) it. I (to think) it (to be) very interesting.

8. What the children (to do) now? — Oh, they (to play) the new board game which I just (to buy) for them.

9. They (to reach) the corner of the street by now and (to stand) at the bus stop.

10. After we (to walk) about two hours, we arrived at a picturesque glade covered with fresh grass.

2. Translate the sentences into Russian:

Я уже две недели живу у друзей.

Я уже две недели жил у друзей, когда получил письмо.Сколько дней вы уже читаете эту книгу?

for my watch. i ( to look) for it for fifteen minutes now.

- You never ( to put) your watch in its place. It ( to seem) to me I ( just to see) it on the shelf next to the telephone.

- Here it ( to be) . Thank you, Diana.

- By the way, your boss ( already to phone) you. He ( to wait) for you in the office for half an hour.

-Oh, dear! I ( completely to forget) about the conference. It ( to start) at 11 p.m. And i ( not to prepare) the report about the result of our research work.

- Jack, you always ( to forget) about important things. You should plan your work more carefully.

- You ( to know) , Diana, I ( to be) very busy these days. Where my shirt ( to be)?

- I ( to iron) it right now. Here you ( to be) .

- Thanks. i ( to leave) now. see you in the evening.