I- Choose the best answer.
1- If people drive their cars .........., they won't get hurt themselves.
2- There is more pollution in the city ....... there is more traffic in the streets.
3- The movie is not interesting .How about ............ to the concert.
4- If I were you , I ............ try my best.
5- Hoa missed the bus .......... she went to school late.
6- You have to listen to your teacher ...........
7- I recently visited the school .......... I used to attend five years ago.
