二、单项选择（本题有15小题，每小题1分，共15分）
从A、B、C、D四个选项中，选出可以填入下列各小题空白处的最佳答案，并将答案填涂在答题卡上
21. —Jane, which color do you prefer, red or blue?
—______. I prefer to buy a green one.
A. Either will be OK B. Both will be OK
C. To be honest, neither D. Generally, I’m not sure
22. Tom put his heart into the wildlife research, and finally, his efforts _______ him great success and fame.
A. saved B. earned C. made D. offered
23. We should pay more attention _____ education, especially in the west of China.
A. to develop B. to developing C. in develop D. in developing
