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When I (go) shopping, I (see) my friend. I ___ (say) ‘Hello!’ and we (start) talking. While we (talk), a car (run into) a man on a bike. When we (see) the accident, I (phone) for an ambulance. While I (wait) for the ambulance, a policeman (arrive). He (ask) us some questions. The ambulance (come), while I (talk) to the policeman. The ambulance (take) the man to hospital and we (go) to a cafe for a cup of coffee. While we (drink) our coffee, we (discuss) about the accident.
Our life is closely connected with environment. The nature is an air, the woods, the rivers, the seas and oceans, and also the big world of wild animals, birds and fishes. And we have to protect this world. Results of scientific researches help to prevent environmental pollution. Special scientific institutes are engaged in scientific researches on preservation of environment. Active participation in protection of the surrounding nature and animals is accepted by school circles of fans of the nature. In circles pupils study the nature and fauna of the native land. Live organisms mastered different habitats. They can be found in the seas and the rivers, in the earth, on a surface and in living beings.