1. The manager wants us to work **more hardly**.
- Correct: more hard

2. Jim runs more **fastly** than his friends.
- Correct: faster

3. I speak English more **fluent** now than last year.
- Correct: fluently

4. Today, Jim performs less **confident** than usual.
- Correct: confidently

5. Lan sings more **sweet** than Hoa.
- Correct: sweetly

6. Their team performed much more **well** than our team.
- Correct: better

7. - Umm, I think I did a little more **badly** than last time.
- Correct: worse

8. In **countryside**, I can sleep soundlier than I do in big noisy city.
- Correct: the countryside

9. In countryside, people live **slowly** and more peacefully than in big cities.
- Correct: slower

10. He used to drive more **careful** than his friends when they lived in the city.
- Correct: carefully