改错
1 1. He told us about the countries where he had visited.____
2. Egypt is a country where is famous for its pyramids._____
3. This is the knife with that the doctor did the operation._____
4. The days when we spent together cannot be easily forgotten. _____
5. The house stands at the place that the two roads meet._____
6. We shall visit the college where his father teaches there._____
7. I know the reason that she looks so worried._____
8. He left me the book,that is very useful for me._____
9. This is the room which food is kept. _____
10. April 15,1976 is the day when we'll never forget. _____