根据下列句子及所给单词的首字母，写出各单词的完全形式。
1. It is almost ten years since Hong Kong r_______ to China in 1997.
2. — I'm going to Hainan on vacation.
— Really? I h_______ you will have a good time.
3. Monday is the s_______ day of a week, not the first day.
4. The more carefully you do your homework, the f ________mistakes you will make.
5. Li Yuchun is very p_______ now. Many young people say she is a super star.