用适当的关系词填空。

1. Everything ______ I know will be taught to the students.

2. This is the best film ______ I have ever seen.

3. The picture ______ has a house and flowers is the one I like best.

4. The house ______ stands on the top of the hill was built last month.

5. The medicine ______ he bought is good for your health.

6. He is the only person ______ saw the accident yesterday.

7. The present ______ he gave her yesterday evening is still unopened.

8. The newspaper ______ you are reading is two days old.

9. The student ______ the teachers are talking about has won the first prize in the English contest.

10. I know the girl ______ the teacher praised yesterday.