Lesson 6. 1. Прочитайте текст и откройте скобки, употребив правильную форму глагола в скобках

Review 2

1. Прочитайте текст и откройте скобки, употребив правильную форму глагола в скобках

The Silent Destroyer (part2)

Besides Danny’s symptoms, there(1. to be) other early signs of lead poisoning. Young victims may (2. to feel) weak and suffer headaches and muscle pains. They may (3. to become) clumsy and drop and break objects. As time (4. to go) by, the young person may (5. to have) stomach pains and complain of a bad taste in the mouth. If the symptoms (6. to be) ignored, the young victim may (7. to become) blind and deaf. Many children (8. to die) each year of lead poisoning.

This kind of poisoning (9. to affect) very young children because they (10. to put) just about anything in their mouths. The coating of toys may (11. to contain) a material with lead in it. Many children (12. to chew) on objects and swallow pieces of them. If the child (13. to swallow) enough material containing lead, early symptoms of poisoning (14. to occur) in a few days. Lead poisoning (15. to be) a silent destroyer of many children because most people (16. not to recognize) the symptoms.

Lead poisoning (17. to be) an environmental problem that can (18. to affect) young people. Lead from the environment can (19. to enter) the body. The exhaust fumes of many cars, trucks, and buses (20. to contain) lead. This pollutant (21. to mix) with the air. During the winter months, lead (22. to mix) with water and snow in the atmosphere.

2.Заполните пропуски, выбрав правильный предлог, если он требуется.

1. At/In/- 1974, scientists confirmed the danger of this gas, and, in/-/during a year, sales of aerosol can products dropped 25%.

2.Air pollution is the contamination of the atmosphere of/in/by waste products on/at/in levels that are unhealthy for/in/by humans and the environment.