二．单项选择（共20小题, 每小题1分，满分20分）
21. More often than not, it is difficult to _____ the exact meaning of a Chinese idiom in English.
A. exchange B. transfer C. convey D. convert
22. Not only ______ interested in football but _______ beginning to show an interest in it.
A. the teacher himself is; all his students are
B. the teacher himself is; are all his students
C. is the teacher himself; are all his students
D. is the teacher himself; all his students are
