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.