Вставте нужный модальный глагол (can may must) You_be at school by eight o clock. It is raining. You_take an umbrella. Students_be quiet when they take a test. My mother_get up early. She works every day. You_play computer so much. I do not have this book? so I_go to the library. Children_do their homework.

1. Must

2. Must

3. Must

4. Must

5. Mustn't

6. Must

7. Must

1.The population growth is the main cause of environmental pollution.
2. In the twentieth century, the population of the planet has increased more than ever in the history of human existence.
3. If this trend continues, in the next century the world population will double.4. Before 1900, many children born did not survive to adult age and, thus, could not have children of their own.5. In 1950 the average life expectancy in the U.S. was 57 years.6. People in these parts of the world began to immunize children have reduced child mortality.7. Already there are signs that in some parts of the world, population growth begins to decrease-Xia.8. In countries where the population grows at 2% per year, the number of inhabitants will advai place every 34 years.9. If the population growth is high in these and other countries, attempts to reduce the rate of growth will be in vain.10. Russia's population is declining sharply, as is born less and less children

1.The population growth is the main cause of environmental pollution.
2. In the twentieth century, the population of the planet has increased more than ever in the history of human existence.
3. If this trend continues, in the next century the world population will double.4. Before 1900, many children born did not survive to adult age and, thus, could not have children of their own.5. In 1950 the average life expectancy in the U.S. was 57 years.6. People in these parts of the world began to immunize children have reduced child mortality.7. Already there are signs that in some parts of the world, population growth begins to decrease-Xia.8. In countries where the population grows at 2% per year, the number of inhabitants will advai place every 34 years.9. If the population growth is high in these and other countries, attempts to reduce the rate of growth will be in vain.10. Russia's population is declining sharply, as is born less and less children.