根据首字母及句意，写出单词的正确形式。
1. He has many h_____, such as listening to CDs, surfing the Internet and running.
2. I don't think it p_____ to speak loudly in the library. We should keep quiet.
3. —Why is the boy so fat?  
    —B_____ he eats too many hamburgers.
4. Eighteen people walk away from the little girl Yueyue e_____ an old granny.
5. The p_____ of the clothes are different. If you don't have much money, you can buy a cheaper one.