第一节：单项填空（共15小题；每小题1分，满分15分）
从A﹑B﹑C﹑D四个选项中， 选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
例：It is generally considered unwise to give a child ________ he or she wants.
A．however B．whatever C．whichever D．whenever
答案是B。
21. Do you think it ______ great reward for London to hold _____ Olympic Games in 2012?
A. a; the B. the; the
C. a; an D. /’ /
