第Ⅰ卷(选择题)
Ⅱ．单项填空(共15小题；每小题1分, 满分15分)
21. They argued for hours on _______ end until the meeting came to _______ end, reaching no agreement. ［2012济南高二检测］
A. an; / B. /; an
C. an; an D. /; /
22．Worried about the safety of my child in such a heavy rainstorm, my attention began to _______ off my work.
A. wonder B. separate
C. wander D. divide
