从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡将该项涂黑。
21. --- Do you need more fish ?
--- __________ .
A. Thank you B. Not likely ?
C. You’re welcome D. No , thanks. I’m up to my ears
22. Just as I am busiest , __________ you come bothering me with some questions now ?
A. may B. can C. must D. shall
23. The royal wedding of William , __________ Britain’s prince , and kate , __________ ordinary girl , draws the worldwide attention .
