21. —Thanks for your help, but can you do me one more favor, please?
—____, sir. What’s it then?
A. Just a minute B. It’s my pleasure C. That’s right D. At your service
22. The driver was at ___ loss when ____ word came that he was forbidden to drive for speeding.
A. /; the B. a; the C. /; / D. a; /
23. “I in the dormitory, watching the live TV broadcast about the tsunami.” David told the policeman who had driven there to question him.
A. was staying B. stay C. stayed D. am staying
