B. 1. The man who is working in the factory
2. The ma
factory is rich.
3. The school that/whi
river is a big one.
4. Have you answere
two weeks ago?
5. The boy student who won the game is
6. He'll meet his daughter who/whom
he hasn't seen for years.
7. The bike that my uncle bought last week
has been stolen.
8. How is the man that/who/whom you saw
9. Don't buy the vegetables that they sell
in the market.
10. The bike that/which I lent to you this
morning is very old.
11. The house whose windows face south is
12. The girl whose father is a doctor
works very hard.
C. 1. that/which 2.
who/that 3. that/ which 4.
that/which 5. who/whom/that 6. whose 7. that 8.
that 9. that 10. that/which
9. 填whom/who/that。先行词the man作talk to的宾语，所以此三个关系代词均可使用。
2. 选B。当先行词是one of +名词复数时，定语从句中的谓语形式与of后的名词在数上保持一致。
3. 选D。what在此作used to be的表语。