Ex.3 YnpaxHeHHA - Past Simple i Past Continuous. 1. When Tom (to cross the street, he (to fall2. When I (to go to school, I (to meet) my friend.3. When we (to go to the cinema, we (to meet) grandmother. 4. When grandmother (to go) home, she (to see) many children in the yard.5. When Henry (to walk) about in the forest, he (to find) a bear cub.6. When we (to walk) about in the forest, we (to see) a hare.7. When I (to wash) the floor, I (to find) my old toy under the sofa. 8. When granny (to read) a book on the sofa, she (to fall) asleep.9. When I (to play) in the yard. I suddenly (to see) my old friend10. When Nick (to run) about in the yard, he (to fall).​

1.Ecological Problems Ecology is a science which studies the relationship between all forms of life on our planet and the environment

2.Large cities with thousands of polluting plants and factories can be found nowadays all over the world. Cars with their engines have become the main source of polluting in industrial countries.

3.Vast forests are cut down everywhere for the needs of industries. As a result many kinds of animals, birds, fish and plants are disappearing nowadays

4.There is an international organization called Greenpeace which is doing much to preserve the environment

5.They pollute the air we breathe, the water we drink, the fields where our crops are grown. The pollution of the air and the world’s oceans and the thinning the ozone layer are the other problems arising from men’s careless attitude to ecology.

6.Active measures should be taken to save the life on our planet