根据句意及首字母的提示，补全单词。
1. He is no longer b_____ of the class. He has become a top student.
2. Finally, he passed the f_____ exam.
3. He needs to make money to s____ his family.
4. The_____ thing that happened this week is that I didn't pass the exam.
5. I have the a_____ to do the work.
