第一节单项填空(共15小题；每小题1分，满分15分)
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21. Animals are obviously lower form of life than man.
A. a ; / B. the ; the C. a ; the D. /; /
22. Your as a student will be excellent if you develop a habit of reflecting on how you learn.
A. operation B. growth C. performance D. characteristics
23. ---Could I have a word with you, mum?
---Oh dear, if you .
A. can B. must C. may D. should
24. Look at his expression and you can guess how he is.
A. bored; bored B. boring; bored
C. bored; boring D. boring; boring
25. It was not what he said but the way he spoke that ________.
A. turned me over B. turned me down C. turned me off D. turned me in
