[     ]

A. of them
B. from which
C. who of
D. of whom

1. I am reading Harry Porter. It is an interesting book. → 
   ____________________________________________
2. He failed in the exam. It made his parents very angry. →
   ____________________________________________
3. He has two sons. Both of them are doctors. →
   ____________________________________________
4. Recently I bought an ancient Chinese vase. The price of it was very reasonable. →
   ____________________________________________
5. Last week, two persons came to see the house. Neither of them wanted to buy it.→
   ____________________________________________
6. I have lost the pen. My father bought it for my sixteenth birthday. →
   ____________________________________________
7. Do you see the house? The windows of it face south.→
   ____________________________________________
8. He must be from Africa. It can be seen from his skin.→
   ____________________________________________
9. The book is worth reading. He paid 6 yuan for it. →
   ____________________________________________
10. She is a teacher of much knowledge. Much can be learned from her. →
   ____________________________________________

[     ]

A. As; that
B. As; which
C. It; that
D. Which; that

[     ]

A. it
B. that
C. what
D. one

[     ]

A. It
B. As
C. That
D. What

A. which I think it
B. which I think it is
C. which I think is
D. I think which is

[     ]

A. whom
B. who
C. which
D. as

[     ]

A. who
B. which
C. what
D. that

[     ]

A. where
B. there
C. which
D. when

[     ]

A. for which
B. in which
C. of which
D. from which