用who / which / where / when / whose / that 填空。
1. This is the professor ______ taught me chemistry in 1980.
2. The hospital ______ was built five years ago has been modernized.
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.
