Giúp ạ!!!!!!

1. The journey is slower by train than by car. 2. You should drive more cautiously. 3. It was the least difficult exam I've ever done. 4. We stayed in the dirtiest hotel in the world. 5. She wants to have a less stressful life. 6. Tony has a quieter voice than Toby. 7. He's a lot less shy than he used to be. 8. Mai paints well. 9. Her house isn't as far from the park as ours. 10. People often walk faster in a city than in the countryside.