III
1. A -> maked
2. B -> hard
3. B -> giving
4. B -> enjoy
IV
1.dependence
2.inventor
3.poisonous
4.Fortunately
2. He has learnt Korean since he was ten
3. More and more air pollution is produced by that factory
4. In spite of his small salary, he is happy
5. Why don't we visit the museum next Sunday