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.

长方形内有一点A，到各边的距离从小到大依次是1、2、3、4，则长方形的周长是（　　）

A．10

B．20

C．24

D．25