1. my mum thinks that cats are (intelligent) pets than dogs. 2. cycling is one of (dangerous) sports. 3. bicycles are (slow) than cars. 4. she is (nice) person i know. 5. glass bottles are (good) than plastic bottles. 6. i think rafael nadal is ) tennis player in spain.
1. more intelligent
2. the most dangerous
3. slower
4. the nicest
5. better
6. the best