从A，B，C，D四个选项中，选出可以填入空白处的最佳选项。
21. ----Good morning , May I help you ?
-----No, thank you. I’m just looking around.
----- .
A. I’m looking forward to it. B. How are you feeling today?
C. I’ll write you a check right now. D. Take your time , then.
22. Over the past years many football clubs ______as business to make a profit.
A. have run B. have been run C had been run D. will run
