IV. Fill in the blank with a suitable word in the box. 1. Some people have a very habit in littering in public. 2. People who live in a dusty area often on diseases. 3. Julia has a headache, and she feels . 4. I have an , so I choose food and drink very carefully. 5. You should spend less time playing computer games, or your eyes will be . 6. Tom feel , but he doesn’t go to bed early. 7. Trung eats too many sweets so he has . 8. In prevent , we should keep our hands clean, our feet warm.