第二部分 单项填空（共15小题，每小题1分，满分15分）
21. I need to get a part-time job ________some money for my school expenses.
A. in order that earn B. in order to earn
C. earning D. earn
22. ---If we don’t do our best to reduce pollution, man’s history won’t last long.
---_________.
A. It’s OK B. You are absolutely right
C. That’s all right D. Mind your own business
