1. 短语填空

talk about, be famous for, break out, at the risk of, insist on/upon

1. （1） They prevented a serious railway accident their own lives.
3. （2） When World War I , Priestley joined the army, and escaped death on a number of occasions.
5. （3） Today he most his play Inspector Calls.
7. （4） You shoulddoing exercise every day.
9. （5） We are the new math teacher.