21. ［2012乌鲁木齐模拟］Only through ________ talks can we build trust and only through cooperation can we create ________ win-win economic situation.
A. /; a B. the; the C. /; the D. the; a
22. Other things being equal, a man who expresses himself effectively in English is sure to succeed more rapidly than a man whose ________ of English is poor.
A. writing B. program
C. command D. impression
