A new broom sweep clean的用法和样例：
- B： He's doing fine. A new broom sweeps clean.
- He's doing fine. A new broom sweeps clean.
- A new broom sweeps clean but an old one knows where the dirts lies.
- He was all right at first. It was a case of a new broom sweeping clean.
- Talk about a new broom sweeping clean! She has already made several radical changes in the running of the company.
- The new headmaster has changed many of the school rules. A new broom sweeps clean.