1. if his/her parents think it's a good idea —?

2. how he/she got interested in ecology —...?

3. what ecological problems he/she wants to study —...?

4. how long he/she has been interested in these problems —...?

5. if he/she will go to university to become an ecologist —...?

6. if it is necessary for an ecologist to know one or more than one foreign languages —...?

7. where he/she is going to work —...?

8. why this profession is important nowadays —...?

9. what subjects he/she needs to study to be an ecologist —...? ​​

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 endanger our oxygen supply.
4. Soon the Earth’s resources will be exhausted if the human population continues to grow.
5. If everybody continues to use aerosols and CFCs, the hole in the ozone layer will get bigger.
6. If the sun radiation can’t escape into space, Earth’s temperature will increase steadily.
7. If the global temperature rises, sea levels will rise too.
8. We’ll threaten our own existence if we do not cut down on waste rapidly.
9. People will run out of drinking water one day if they do not use it more rationally.
10. If he wants to help the planet, then he has to change his habits

2) Kate has got a beautitul pointer, hasn't she? 3) Nick and Mike are sitting at the desk, aren't they? 4) He bought two rulers yesterday, didn't he? 5) She will come to school on time, won't she? 6) There is no bookcase in our classroom, is there? 7) They come to school at 8:30, don't they? 8) It is Masha,s classroom, isn't it? 9) There are some books on the table, aren't there? 10) You can see a duster under the blackboard, can't you? 11) The teacher has got pens, hasn't he/she? 11) Masha will come to her classroom tomorrow, won't she?