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
