4. best word: match
5. best word: worked

II/

1. She likes reading books which tell about different peoples and their cultures.
2. "Buy me a book on your way back, will you?"
3. He worked hard, didn't he?
4. I'll give you a lift to the station if you are in a hurry.
5. I'm feeling pretty tired. Do you mind taking me home?
6. Scientists and engineers have invented devices to remove polluted pollutants from industrial wastes.
7. We need some sunshine; so we have made up our minds to go abroad.