根据句意、汉语提示或首字母和英文释义写出单词的正确形式。
1. They enjoyed __________(他们自己) in the park.
2. When I met her, I realized that I had __________(忘记) my book at home.
3. I feel bad that I didn't __________(提供) any food to them.
4. An old friend of __________(她的) came to see her yesterday, She was unexpected.
5. Spitting in public places is bad __________(举止).
6. I had already __________(建议) him not to do like this, but he didn't listen to me.
7. I feel __________(骄傲的) to be a part of the team.
8. The truck was traveling at a __________(速度) of 50 mph.
9. He has two p__________ to be operated on.
10. She lives by herself and often feels l__________.
11. Anyone who does anything a__________ the law will be punished by the law.
12. She lost c__________ of her car on the ice and knocked into a shop.
13. He played the r__________ of the old king in our school play.
14. The problem is really quite s__________, we can easily work it out.
15. Children like Spring Festival because they can get red p__________.