A、  B、  C、  A

6. I go to school on foot every day because my home is quite near the school.
   7. My mother called us as soon as she arrived in London.
   8. There is a post box at the corner of the street.
   9. Wang Hui saw his parents off at Beijing Airport.
   10. Oct. 6 is my birthday. I will have a big party on that day.