2. He failed in
the exam, which made his parents angry.
3. He has two
sons, both of whom are teachers.
4. Recently I
bought an ancient Chinese vase, the price of which was very reasonable.
5. Last week, two persons came to see the
house, neither of whom wanted to buy it.
6. I have lost the pen, which my father
bought for my sixteenth birthday.
7. Do you see the house, the windows of
which face south?
8. He must be from Africa, which can be seen from his skin.
9. The book, for which he
paid 6 yuan, is worth reading.
10. She is a teacher of much
knowledge, from whom much can be learned.
