Объяснение:
Environmental problems have become one of the most urgent problems of modern society. More and more people suffer from air and water pollution. Nature also suffers from land and nuclear pollution. The reasons for such environmental problems are numerous.
Among them increasing number of cars in the streets, factory waste, millions of cut down trees, destroyed habitats of animals, contaminated rivers and seas. All these problems mainly arise due to human careless activities and gradually destroy our planet. If we look closely, we’ll notice that not only one city is under danger, but the majority of world population.
Someone was repairing their bikes. 2) Who is checking the passports? 3) We were fixing the satellite dish at 7p.m. yesterday. 4) One of the cable TV channels is presenting a new quiz show. 5) Newton discovered the law of gravity. 6) A building team was building the house when we returned to the town. 7) Cole Porter composed some nice musicals. 8) Someone was turning off TV while I came in the room. 9) Students handed out fliers last week. 10. At this very moment we are watching the soap opera on TV. 11. Journalists usually interview a variety of people.
Объяснение:
2)assistant measures the water pressure.
3)several books on the shelf.
4)After classes we descend somewhere.