用括号内单词的适当形式填空。

1. This is my _____ (personality) letter, you can't open it.

2. The _____ (design) building attracted thousands of people.

3. I prefer _____ (lie)on the beach to _____ (swim) in the sea.

4. The dress looks _____ (cool) on you.

5. His mother bought him a pair of expensive _____ (run) shoes.