b) Put the adjective in comparative and superlative form.
I am ___________ (tall) my sister.
2. My mum thinks that cats are ___________ (good) pets than dogs.
3. Cycling is one of ___________ (dangerous) sports.
4. I want to have ___________ (big) car.
5. A blue whale is ___________ (heavy) twenty-five elephants.
6. You look ___________ (thin) last month. Have you lost weight?
7. Bicycles are ___________ (slow) cars.
8. She is ___________ (nice) person I know.
9. What is ___________ (good) film you´ve seen?
10. Computers are ___________ (cheap) mobile phones.
11. Is your brother ___________ (tall) you?
12. I think Spanish is ___________ (easy) Japanese.
13. Our dog is ___________ (nice) your dog.
14. Glass bottles are ___________ (good) plastic bottles.
15. I think Rafael Nadal is ___________(good) tennis player in Spain.
16. Sharks are ___________ (dangerous) other fish.
17. This situation is ___________ (serious) the last one.
18. He is ___________ (smart) his brother.

1. Talller than2. better3. the most dangerous4. the biggest5. heavier than6. thinner7.slower than8. the nicest 9. the best10. cheaper than11. taller than12. easier than13. nicer than14. better than15. the best16. more dangerous than17. more serious than18. smater than