Ответ:
1. Yesterday I bought a very beautiful painting. I will give it to my granny.
2. Mark won`t go to school today. He is ill.
3. Justin`s parents are travelling around Europe now.
4. The Romans brought Christianity to Britain.
5. The telephone was invented by Alexander Bell in 1876.
6. Mary has been to the USA three times already.
7. I didn`t decide yet what to do in the future.
8. Leninsky Avenue is the longest street in Moscow.
9. Some old Russian cities are very attractive to the foreigners.
10. These summer holidays were better than the previous ones.
11. Beautiful roses are being planted by my granny in her garden every year.
12. Russia is celebrating the 75th anniversary of the Victory in the Great Patriotic War.
13. Anny said she will pass her final exams at music school next year.
или Anny is going to pass her final exams at music school next year.
14. It was Jenny`s first day at her new school. She liked it.
15. We will talk about the importance of recycling next lesson.
или We are going to talk about the importance of recycling next lesson.