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.

引起蛛网膜下腔出血的常见原因是（）

A.脑脓肿

B.海绵状血管瘤

C.脑炎

D.脑外伤

E.脑动脉瘤