1 Put the adjectives in brackets into the positive, comparative

1 Put the adjectives in brackets into the positive, comparative or superlative forms (Поставьте прилагательные в скобках в положительную, сравнительную либо превосходную ступень):
1. It is (valuable) painting in the gallery.
2. Petrol is twice as (expensive) as it was a few years ago.
3. I strongly believe that Barcelona is (good) than Real Madrid.
4. Working in the office is (safe) than working in armed forces.
5. Unfortunately, her illness was much (serious) than we thought at first.
6. My (old) son is 13 years old.
7. You look (thin). Have you lost weight?
8. What is (popular) спорт in your country?
9. It was (bad) experience in my life.
10. We had a great holiday. It was one of the (enjoyable) holidays weve ever had.