III. 1. C
2. B
3. A
4. B
5. A
IV. 1. Five houses in a village were buried in the eastern region by the mudsline.
2. Three cats have been rescued by the volunteers.
3. Dead trees on some streets have been cut down to prepare for the coming storm.
4. The furniture shold be moved to higher places because of the floods.
5. When the typhoon came, they had repaired their house.
6. His lunch is prepared by him every day.
7. The air was destroyed seriously.
8. If she learnt hard, he would pass her exam.
9. If you stop talking, you will understand the lesson.
