I/
1. D
2. D
3. B
4. A
II/
1. B
2. D
3. C
4. C
III/
1. replace
2. should use
3. forgot
4. collecting
VI/
1. The woman who wears a yellow hat is my teacher.
2. The man whom I saw yesterday is a doctor.
3. The picture which is on the top is beautiful.
4. These cakes which I bought yesterday are very delicious.
5. A girl who was injured in the accident is now in hospital.
6. This book which is expensive is very interesting.
