Here are the correct words or phrases underlined:

1. Cattle usually cross over the road. You should drive **more carefully**.
2. Life in some parts of the country is **more boring** than that in other parts.
3. The old usually get up **earlier** than the young.
4. An ox doesn’t plough **better** than a buffalo.
5. These 7 thinking habits will help you become **more confident**.
6. Don’t worry. The river is not as **deep** as it looks.
7. After a hard working day, you may sleep **more soundly** than usual.
8. My father has been much **healthier** since he stopped smoking.
9. The air in the mountainous zones is **fresher** than that in the cities.
10. I can’t understand. Would you ask him to speak **more clearly**?