根据所给中文写出单词的合适形式。

1. The hair clip              ( 配) my new skirt very well.

2. She is so                (激动) when she knows the news.

3. This beautiful walkman             (花费) 300 dollars.

4. The price of the teddy bear is too             (昂贵).

5. This is a              (相当) difficult question.

数据库保护分为安全性控制 【5】 、并发性控制和数据的恢复。