1. We have already worked up a new way of doing it.
- Sửa thành: We have already worked out a new way of doing it.

2. I can't keep up to all the changes in technology nowadays.
- Sửa thành: I can't keep up with all the changes in technology nowadays.

3. Have you ever considered getting rid your bad habits?
- Sửa thành: Have you ever considered getting rid of your bad habits?

4. The teacher asked us to see through the textbook before she continued.
- Sửa thành: The teacher asked us to go through the textbook before she continued.

5. Mary and Peter broke them up after two months dating.
- Sửa thành: Mary and Peter broke up after two months of dating.

6. You should clear your room up before mom comes back.
- Sửa thành: You should clear up your room before mom comes back.

7. I was happy that I ran my old teacher into yesterday.
- Sửa thành: I was happy that I ran into my old teacher yesterday.

8. Mary is always showing her jewelry off.
- Sửa thành: Mary is always showing off her jewelry.

9. Both of us agreed with Jane's opinion about our plan.
- Sửa thành: Both of us agreed with Jane's opinion on our plan.

10. Last year a research on the consequences of water pollution was carried on.
- Sửa thành: Last year, research on the consequences of water pollution was carried out.