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 ) tennis player in spain. 16. sharks are (dangerous) other fish. 17. this situation is (serious) the last one. 18. he is (smart) his brother.