Ⅱ. 单项填空(共15小题；每小题1分，满分15分)
21. It is so good that he has earned ______ 5, 000 this month.
A. no fewer than B. as many as
C. up to D. less than
【解析】选C。句意：他这个月能挣5 000美元，好极了。此处工资、收入为抽象名词，不可数，排除A和B；up to 多达，符合题意；less than 少于，与so good 相矛盾。另as much as也可。
22. The parents needn’t pay their children’s school ______to the school now, and the government does it.
A. salary B. pay
C. fees D. income
【解析】选C。句意：家长们现在不必向学校付孩子们的学费了，由政府支付。 salary薪水；pay工资，薪金，income 收入；fee 费用。 school fees 学费。
