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3.Замените придаточные предложения причины причастными оборотами.

1. As he now felt more at ease, the man spoke in a louder voice. 2. Since he knew who the man was, Robert was very pleased to have the chance of talking to him. 3. As he thought that it was his brother at the window, Steve decided to open it. 4. As the people were afraid of falling into a ditch in the darkness at any moment, they felt their way about very carefully. 5. Since he needed a shelter for the night, Peter decided to go to the neighbours' house.

4.Раскройте скобки, употребляя глаголы в Present Participle или Perfect Participle.

1. (to live) in the south of our country, he cannot enjoy the beauty of St. Petersburg's White Nights in summer. 2. (to talk) to her neighbour in the street, she did not notice how a thief stole her money. 3. (to read) the story, she closed the book and put it on the shelf. 4. (to buy) some juice and cakes, we went home. 5. (to sit) near the fire, he felt very warm. 6. (to do) his homework, he was thinking hard. 7. (to do) his homework, he went for a walk. 8. (to sell) fruit, he looked back from time to time, hoping to see his friends. 9. (to sell) all the fruit, he went to see his friends. 10. (to eat) all the potatoes, she drank a cup of tea. 11. (to drink) tea, she scalded her lips. 12. (to run) in the yard, I fell and hurt my knee. 13. (to look) through some magazines, I came across an interesting article about UFOs. 14. (to write) out and (to learn) all the new words, he was able to translate the text easily.

UNIT 8

Forms of energy

I. Tasks before reading.

Discuss the following questions.

a)What role does the Sun play in our life?

b) Some pocket calculators are powered by solar cells, but many use batteries. What are the advantages of using solar cells? Are there any disadvantages?

c) What do you know about the energy crisis we are facing today?

d) What solutions can you offer?

II. Listen to the students' discussion and name advantages and disadvantages of alternative energy sources

Sveta: Alex, I would like you to read this article. It seems to be very

interesting.

Alex; Does it really? What's so special about it?

Sveta: Well, you had better read it by yourself. Anyway, it appears

to discuss the energy crisis threatening us today.

Alex: Oh, I hear something about it. We consume too much energy and exhaust our fossil fuel resources consisting of oil, coal and gas. However, technological progress cannot be stopped. Sveta: Don't worry. The solution is likely to be found anyway. Have you heard about alternative energy sources developed by the scientists all over the world?

Alex: Certainly, these alternative sources of energy are assumed to have many advantages, but actually they are very expensive and rather inefficient.

Sveta: Well, the new method only needs perfection. Besides, as we are sure to run out of fossil fuels soon, do we have other options?

Alex: No, we don't. And moreover, the alternative sources of energy

seem to be inexhaustible and causing no pollution.

Sveta: That speaks for itself, doesn't it?

Alex: Without any doubts. OK, where is the article? I need further information.

Sveta: Here it is.

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