根据句意和首字母提成下面的单词。
1. English is the language of international b _.
2. Many people learn English so they can have more s _ in business.
3. Sometimes, business English is h _ to understand.
4. If you join our c _, you'll learn all the business lingo you need.
5. My aunt always feels weak and tired,because she is too f _.
6. Lei Feng always helped others,and he gave us a good e _.
7. Because he is a b _,he doesn't know how to do it.
8. Please pay for courses by c . Don't mail cash.
9. If you work hard,you'll pass the f _ exam.
10. If you pass the exam,you'll get a c _.
