Fill in the gaps:
1. My sister is really interesting ........... history.
2. Mr.Nam sent me this postcard.............. Bejjing.
3. Salads are good.............. our healthy, but we must wash them carefully............. water.
4. Viet lives............ his grandparents............. 83 Hoang Van Thu Street.
5. What's your place........... birth, Nam?
6. I'll wait........... outside the stadium.
7. Let's meet ........... 7 o'clock in front.......... the park.
8. Trung will have a party............ her birthday .......... home.
9. She added a little salt ........... the spinach.
10. You should eat plenty.......... fruit and vegetalbes.
11. Wash your hands.......... meals.
12. She made a blue dress......... her daughter.
13. They arrived home ........... the evening.
14. My house is ............. the hotel and the drugstore.
15. The newspapers are ............... the racks at the back ...................... the library.