填空。
1. This is the professor _____ taught me chemistry in 1980.
2. The hospital ______ was built five years ago has been modemized.
3. This is the boy _____ father died three years ago.
4. The film_____ we saw the day before yesterday is very interesting.
5. Do you know the student ______was praised at the meeting?
6. 1949 is the year _____ the People's Republic of China was founded.
7. They work in a factory ______makes radio parts.
8. They work in a factory ______ radio parts are made.
9. This is the vision phone through ______  we can see and talk to our friends.
10. Here are players from Japan,some of ______ are our old friends.