2. brushes

3. he studies very hard

4. and

5. he doesn't say a word to me

6. I won't buy anything

7. he is my co-worker

8. Wear thick clothes

9. he can't go to school today

10. and

11. he needs to avoid cold drinks

12. we can go out and build a snowman

13. raindrops will leak in

14. I try not to be late

15. he recovers quickly