bantuin jawab ya semua aku bingung nih

4. a salesman will knock the door of the house
5. cugarette ends often cause forest fire
6. the postman is sending the letter to her home
7. the government built the airport during the war
8. the government will close the factory next week
9. a car company held a race for old cars once a year
10. the teacher have instructed the students to participate the poster competition
semoga membantu