根据句意及汉语提示填空。
1. If I have a _______(机会), I believe I will do better next time.
2. All the football players must _______(遵守)the football rules.
3. It's very nice of you, but I can_______(对付) the box myself.
4. Dr. White _______(发明)a kind of new medicine last year.
5. One of my teammates fell ill, so he can't _______(训练)with us now.
