Грамматика

1. Выберите правильный вариант:

1. They were happy … part at our conference.

a. to take

b. to be taken

c. to taking

d. to have been taken

2. The theory … is very important for future inventions.

a. to discuss

b. to be discussed

c. to have discussed

d. to have been discussing

3. I expect … … me a letter.

a. she to send

b. her send

c. her to send

d. she to sent

4. Mother made … … the soup.

a. I eat

b. me eat

c. me to eat

d. me to be eaten

5. You are supposed … in four years.

a. to graduate

b. to have graduated

c. to be graduated

d. graduate

6. If my friend … to see me, I shall be very glad.

a. came

b. come

c. comes

d. is coming

7. If my father returns early, we … TV together.

a. watch

b. shall watch

c. should watch

d. watches

8. If you … the train, you would have arrived in time.

a. didn’t miss

b. haven’t missed

c. hadn’t missed

d. wouldn’t missed

9. If my friend … in my office we should meet every day.

a. worked

b. works

c. had worked

d. has worked

10. If you spoke English every day, you … your language skills.

a. will improve

b. improves

c. would have improved

d. would improve

11. … he known the subject better, he wouldn’t have failed in his exam.

a. Were

b. Was

c. Had

d. Has

12. He has given me … of his English books.

a. ones

b. that

c. those

d. one

13. I will show you the engine … we must test.

a. ones

b. that

c. those

d. one

14. Give me … textbooks.

a. ones

b. that

c. those

d. one

15. These texts are too long, we need shorter … .

a. ones

b. that

c. those

d. one

Вариант 2 текст

Прочитайте текст. Выполните задания:

The Promising Field of High Pressure Research

Subjecting materials to high pressure greatly changes their properties. When compressed under more than 500,000 pounds per square inch ordinary liquids become solids. Gases become liquids. Some rocks stretch like rubber. Insulating materials begin to conduct electricity. Water freezes at room temperature into dense heavy cubes which explode violently when the pressure is suddenly released.

The most interesting discovery in connection with high pressure research is the artificial conversion of graphite to diamonds.

The interior of the earth itself is a high-pressure laboratory. The pressure at the centre of the earth is estimated to be 3,000 kilobars. Graphite subjected to the tremendous heat and pressure generated deep below the earth's surface turns to diamond in the course of thousands or, perhaps, millions of years. Today total output of synthetic diamonds in the world amounts to several tons annually.

Metals become increasingly conductive under high pressures. This has led some scientists to suggest that increasingly high pressures might cause some metals to become superconductive at room temperature. Superconductivity, the complete absence of electrical resistance, has numerous potential scientific applications, but can now be obtained only at extremely low temperatures close to absolute zero (minus 459 degrees F.).

High-pressure research together with other observations may lead to answer for some of the most basic science questions, among them the question of the origin of solar system and how life began within it.

1. Выберите правильный ответ на вопрос:

l. What happens with gases under pressure?

a. Gases become liquids

b. Gases become solids

c. Gases become air

d. Gases dissolve