IV. Прочитайте тексты и в каждый пропуск запишите подходящее слово из данных. Обратите внимания, что к каждому тексту даны три лишних слова.

invented surface expanded depth freezes moulded effect property Glaciers quantity

stored pressure transmitted gradually vital fractional

concentrates liquid structure evaporates

unique heat turbine steam expansion jet propulsion

rotates source evaporates

signals telescopes orbits increased artificial solar measure attracted sources transmitted

А

В

С

1. Currents of very cold air

a) but also sound, heat and electricity.

1. c

2. Physicists study not only light

b) and are cold-blooded.

3. We are slowly poisoning our

c) make the water vapour in clouds freeze.

4. Mercury is

d) most important natural resource.

5. Reptiles are covered with scales

e) highly poisonous.

6. Lightning is a sudden

a) between high and low pressure areas.

7. Oil floats on water and does not

b) discharge of electricity.

8. Wind is simply the movement of air

c) the heat gives energy to the water molecules.

9. Outside the solar system

d) dissolve in it.

10. When water changes into steam

e) distances are so great that very little has been found out.

11. Water evaporates and expands

a) is needed by plants to make sugars.

12. Big radio telescopes

b) which have no backbones.

13. Insects are small animals

c) is measured with a barometer.

14. Atmospheric pressure

d) when it is heated.

15. Carbon dioxide

e) pick up radio signals from space.

16. Oxygen

a) is produced by the evaporation of water and by breathing of living things.

17. Mercury is used as

b) is vital to life.

18. Compounds are substances which

c) air and their controls are aerodynamic.

19. The moisture in the atmosphere

d) consist of two or more elements.

20. Hovercraft ride on a cushion of

e) a catalyst in the production of plastics.

21. Fuel oil

a) is a valuable source of energy.

22. Dams are immense structures

b) produces forward motion.

23. Compressed steam

c) contains sulphur.

24. Air increases in

d) which hold back the water of a river.

25. Backward thrust

e) volume as the temperature rises.

26. Chemists not only analyze compounds

a) before it is pumped back into rivers, seas.

27. Amphibians usually have

b) hydro-electric power.

28. Sewage is treated and broken down

c) it rises.

29. As water vapour is lighter than air

d) but also combine elements to form compounds.

30. Dams are used to produce

e) moist skin.

31. The bigger the difference between the pressures

a) than all other chemical compounds together.

32. The rushing water

b) consist of only one cell.

33. Action is

c) the stronger the wind is.

34. There are more carbon compounds

d) drives the turbines.

35. Some living things

e) equal to reaction.

36. When oil is burnt in industry

a) an unchanging body temperature.

37. Snowflakes are crystals

b) produces about 12 cubic centimeters of steam.

38. A microscope is an instrument

c) some poisonous substances are formed.

39. One cubic centimeter of water

d) which magnifies very small objects.

40. Mammals have

e) with a beautiful patterned structure.

41. Oxygen is needed

a) to find their way when land was out of sight.

42. Amphibians are animals

b) varies all the time.

43. Ancient sailors used the sun and the stars

c) life-giving water to the deserts around.

44. The pressure of the atmosphere

d) which live both on land and in water.

45. Irrigation channels bring

e) by the body cells of all animals.

46. Electro-magnets generate

a) is like a small laboratory, packed with instruments.

47. Every satellite which is sent up

b) with a naturally dry skin.

48. Reptiles are animals

c) is very useful in industry.

49. A cubic metre of cold air is heavier than

d) the same volume of warm air.

50. Oxygen

e) current in coils of wire.