очень нужны ответы на номер 7">

1

1. Many wildlife habitats will be destroyed, if man keeps polluting the environment.

2. If we dump all sorts of chemicals into rivers,  we will not be able to swim in them in the future.

3. If we do not stop cutting down so many trees, we will be endangered our oxygen supply

2

1. If another student asked to copy my homework, I would say «No».

2. I would call the police, if I lost in the forest at night.

3. If my mobile phone fell in the toilet, I would ask some help.

3

1. If the government had given more money to the factory, it would not have been closed.

2. If we had listened to the weather-forecast, we would have known it was going to rain.

3. If you had prepared for the exam, you would have passed it.

4. If Bill had seen the house, he would not have bought it.