单项选择 （本题共15小题；每小题1 分，满分15 分）
( )21.The Nobel Prize in Literature 2012 is awarded to Mo Yan, ________ famous Chinese writer. And he is ______ first Chinese to won the prize.
A. a, a B. a, the C. the, the D. the, a
( )22. It’s generous_______ him to give so much money to charities .Now he thinks it’s important _______him to help people in poor areas.
A. of; to B. for; to C. of; for D. for; for
( ) 23. Work hard, ________you will get good marks.
A. and B. but C. or D. so
