Insert articles where necessary:1....dog is ...animal. 2.My sister plays ...piano beautifully. 3.Tim flies ...aeroplanes.He is ...pilot.4....Radio was invented by Russian engineer Popov. 5. Wait! ..room is not vacant, there are ...students in there. 6. In the morning Bill received ...very serious ...letter from ...boss. Now he is writing ...reply letter. 7. I took ...taxi to ...station. 8. Have you got ...camera? 9. What do you usually have for ...dinner? 10. ..earth goes round ...sun.

1. A dog is AN animal.
2. My sister plays piano beautifully.
3. Tim flies aeroplanes. He is A pilot.
4. Radio was invented by Russian engineer Popov.
5. Wait! THE room is not vacant, there are students in there.
6. In the morning Bill received A very serious letter from THE boss. Now he is writing A reply letter.
7. I took A taxi to THE station.
8. Have you got A camera?
9. What do you usually have for dinner?
10. THE earth goes round THE sun.