第二部分: 英语知识运用 (共两节,满分35分)
第一节: 单项填空 (共15小题, 满分15分)
21. Many people agree that ______ knowledge of English is ______ must in international trade today.
A. a; / B. the; / C. the; the D. a; a
22. The _______ on her face told me that she was happy.
A. impression B. sight C. appearance D. expression
