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Проверьте пожалуйста правильность написания вопросов:

1. What is the official name of the country?

2. Why  children study at home and talk to their techer by radio?

3. The capital city of Australia is Sydney or Canberra?

4. Who hoisted the British flag and Australia became British?

5. What is the national language in Australia?

6. Has Australia modern factories and farms which produce mineral resources?

7. How many states and territories Australia consists of?

8. Why we should be careful in Australia?

9. When and by whom did Australia was discovered?

10. What is the main kinds of sports Ausrtralians usually play?