第二部分:词汇知识运用(共两节，满分45分)
第一节：单选 （共15小题；每小题1分，满分15分）
21. In __ area of agriculture, Yuan Longping is __ very famous person.
A. the; a B. the; / C. a; the D. /; a
22．—I have passed the English exam.
—________ ! You always work hard.
A．Good luck B．Don’t mention it C．That’s all right D．Congratulations
23．— You know, Bob is a little slow ______ understanding,
— So I have to be patient ________ him.
A. in; with B. on; with[来 C. in; to D. at; for
