Road users should obey the traffic rules strictly. (obeyed)
→ The traffic rules should be obeyed strictly by road users.

3. My father doesn't smoke anymore. (used)

→ My father used to smoke when he was young.
5. Our teacher is always a careful driver. (drives)

→ Our teacher always drives carefully 
6. There wasn't much traffic when I was small. (use to)

→ There didn't use to be many traffic jams when I was small.
7. A lot of people attended the festival although it took place in a remote area. (However)

→ The festival took place in a remote area; however, a lot of people attended it. 
8. Although they were tired, they wanted to watch the match (in spite of)

→ Although the festival took place in a remote area however, a lot of people attended it.

1, The traffic rules used to obeyed strictly by road users.

2, My father doesn't use to smoke any more.

3, Our teacher drives careful.

4, There used to be much traffic when I was small.

5, A lot of people attended the festival;however, it took place in a remote area.

6, In spite of they were tired, they wanted to watch the match.