II.单项填空：(15分)
21. How about taking ____ short break? I want to make _____ call.
A. the; a B. a; the C. the; the D. a; a
22. ---What does the sign over there read?
---“No person _____ smoke or carry a lighted cigarette, cigar or pipe in this area.”
A. will B. may C. shall D. must
23. Peter received a letter just now____ his grandpa would come to see him soon.
A. said B. says C. saying D. to say
