VI. Выберите английское предложение, наиболее точно передающее содержание предъявленного предложения.

19. We should prevent animals from extinction.

a) People should protect animals from dying out.

b) We should prevent animals from existence.

c) Animals shouldn't be on the brink of extinction.

20. If we realize the coming danger, we'll see that we should find solutions to all the problems to survive.

a) We could find the solutions to all the ecological problems only if we understand the coming danger.

b) Whether we understand the coming danger, we'll see that we should find solutions to all the problems to survive.

c) If we had realized the coming danger, we would have seen that we should find solutions to all the problems to survive.

21. We must protect the ozone layer from harmful industrial products.

a) We have to protect the ozone layer from harmful effects of industrial emissions.

b) We are to prevent the ozone layer from destroying harmful industrial products.

c) We might protect the ozone layer from harmful industrial products.

VII. Выберите правильную видовременную форму глагола.

22. Ecology is a science which … with the interrelations of organisms and their environment.

a) was concerned

b) will be concerned

c) is concerned

23. There … about 6 billion people in the world at present.

a) is

b) was

c) are

24. The population …. very fast.

a) grow

b) is growing

c) were growing

25. Scientists believe that in a few decades the population … too big for the earth to support.

a) is

b) was

c) will be

26. The Earth … constantly in different ways.

a) is being damaged

b) were damaged

c) damage

VIII. Заполните пропуски правильными модальными глаголами или их эквивалентами

27. We… to admit the increase of industries.

a) was

b) may

c) have

28. … quarrels and killing among the crew be permitted?

a) can

b) are

c) ought

29. We … find solutions to all the problems to survive.

a) should

b) have

c) are allowed

30. We … save more energy and water.

a) have

b) must

c) are

31. We … prevent animals from extinction.

a) are able

b) have

c) should

IX. Заполните пропуски прилагательными в нужной форме.

32. The Earth is being constantly damaged in … ways.

a) more different

b) less different

c) different

33. We should make our plant a … place.

a) safer

b) safest

c) best

34. We should find the … solution to all the problems to survive.

a) good

b) best

c) better