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