第一节：单项填空（共15小题；每小题1分，满分15分）
21．---Do you think our basketballers played very well yesterday?
----______．
A．They were not nervous at all B． They were still young
C．They played naturally D． They couldn’t have done better
22. The farmers thought of ways ________ their trees.
A. of protect B. protecting C. to protect D. to protecting
