Đáp án:
1. They worked fast to cover the distance before the breakfast hour.
2. He wanted to go there at once.
3. He is extremely careful in his work.
4. He walked further than I did.
5. Are you quite sure of this?
6. I don’t know it so well as he.
7. Today I feel somewhat better.
8. They usually begin to work at 6 o’clock in the morning.
