II.单项填空（共15小题；每小题1分，满分15分）
从每题所给的A、B、C和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。
21. The report urged that all the children _______ to swim.
A. are taught B. be taught C. to be taught D. being taught
22. He stays at home every day without a job, but he gets good ___ by renting houses.
A. wages B. fees C. salaries D. incomes
