слова: other, law, famine, survive, wasted, petrol, air, polluted, power stations, endangered, greenhouse, effect, dangerous, problems, reduce, habitats, damages, global warming, poverty, fields, coal, earth, toxic, climate, hunger, poisoned, seas

предложения:
1. there are many ecological in the world
2. the first problem is pollution
3. factore, plants and emit fumes
4. the atmosphere has become
5. acid rain falls into rivers, lakes and
6. water plants, fish and sea creatures cannot live in water
7. when it rains, trees, land, water become far living begins
8. the problem is water pollution
9. this harmful water flows through the and poisons soil
10. acid rain causes serious to important building and monuments
11. the next problem is species
12. people cut down trees and destroy animals
13. lots of people hunt even it is prohibited by the
14. nowadays many people in the world die from famine, and disease
15. in asia and africa is hardly rains and people die of
16. if we want to we must think about the
17. we should gases and smokes
18. electricity and energy shouldn't be
19. we should use solar power instead of and

заранее ​

1. A lot of tourists come to St. Petersburg because it is a large and beautiful city that is known as the cultural capital of Russia.
2. Yes, it was. It was the capital of Russia in 1712-1918.
3. I would prefer to visit the Winter Palace, the Hermitage, the Mariinsky Theatre, the Neva with its famous bridges, Kazan and Saint Isaac's Cathedrals, Nevsky Prospect and much more.
4. The Winter Palace was the first Imperial Palace and now it's the most famous building in the city, situated in Palace square.
5. The Summer Garden is situated between Kutuzov embankment and Fontanka embankment.
6. We can see there the monument called The Bronze Horseman (devoted to Peter I) and a monument, devoted to I.A.Krylov.
Krylov wrote fables. They are: The Crow and the Fox, The Elephant and the Pug, The Donkey and the Nightingale. 
7. The Russian tsars lived in the Winter Palace, which is the Hermitage museum now
8. The city of St. Petersburg was founded by tsar Peter I. It was in 1703.
10. St.Petersburg had official names: Petrograd,  Leningrad and a lot of inofficial such as  Northern Capital, Northen Paradise The City on the Neva.

Present simple : what time do you usually get up?
во сколько ты обычно встаешь?

past simple: what did you do yesterday? что ты делал вчера?

future simple: will you visit your granny tomorrow? Ты навестишь завтра бабушку?

past cont: what were you doing when I called you yesterday at 5? что ты делал вчера в 5 ч, когда я тебе позвонил?

present perf: have you ever been to Spain? Ты когда-нибудь был в Испании?

past perfect: by the time you come home, had my mother already left? к тому времени, когда ты пришел домой, твоя мама уже ушла?