二、单项填空(本节有10小题,每小题1分,共10分)
21. Many people agree that ______ knowledge of English is a must in ______ international trade today.
A. a; 不填 B. the; an C. the; the D. 不填; the
22. The president ______ the new economic policy.
A. announced B. told C. informed D. promised