Check through the different uses. Look at the following phrases and write in which type you think they are. Then use one of the modal verbs in brackets to fill the gaps. They (may/must) be away for the weekend but I'm not sure. 2 He (can/could) be French, judging by his accent. 3 They (can'tmay). still be out! With luck, tomorrow (can't/could). be a sunny day. 5 You (can/might). be right but I'm going to check anyway. be easy. You never know. 6 The exam (can't/might) It (may/can't) b'e true about a sauropod dinosaur living in Lake Teté in the Coogo. It's impossible

1. People live on the Earth
2. The Earth is big
3. не знаю
4. In oceans, lakes, rivers, seas
5. On The Earth there a seven oceans
6. On the earth there are 4 million hectares of the woods
7. не знаю
8. Yes, it is.
9. Because she's a big, spacious. She has a water and air, beautifull sunset and sunrise, many animals,birds and others.
10. Becuse this information can be seen on TV
11. I don't know
12. When the day
13. When the night
15. Of course, she has a 251 countrys
16. The most popular language is English. 
17. I live in ... (город в котором ты живешь). Russia is the largest country in the world

1.Today at 9 AM I was watching an interesting programm on TV.
употребляется в Past Continuous
2. I was in London last year.
Past Simple, так как время указано и действие уже завершено.
3. What are you talking about?
Present Continuous, в данный момент.
4. Every weekend I visit my grandmother.
Present simple, действие обычное.
5. I was sleeping when someone knocked the door.
Past continuous, затем действие прерывается и ставится в past simple.

2) 1.She has called us
2. I have eaten my lunch
3. She has taken an umbrella
4. My friend has been in Madrid
5. We have spent all our money
6. My sister has seen a trained elephant in India.