I.
1. used to
2. used to
3. use to
4. use to
5. used to
6. to walk
7. use to
8. used to
9. be
10. use to
II.
1. How far is it to your company? Where do you live? It is about 10 kilometre.
2. How far is it from J's apartment to her school?
3. My father and I didn't use to spend time with each other.
4. Did this man use to be a famous actor?
III. However bằng nghĩa với nevertheless nên dùng cái nào cũng được
