I. 1.That
2. Whom
3. Who
4. Whose
5. Who
6. Which/that
7. Who
8. That
II. 1. Who
2. Where
3. Whose
4. That
5. Whom
III. 1. I talked to the girl who had asked for an appointment
2. The glasses which were broken were my grandmother’s.
3. The tie which Margaret bought for you is very expensive.
4. The pen which I bought writes very well.
5. The audience applauded the speaker who delivered the most interesting speech.