Ⅱ. 单项填空（共15小题; 每小题1分，满分15分）
21. This attempt turned out to be _______ failure, but, as we know, success often comes after _______ failure.
A. a; a B. /; / C. a; / D. /; a
22. My father did not _______ the idea that I would go camping with my friends this weekend. He said it was dangerous for girls to live outside.
[2011孝感高二检测]
A. depend on B. approve of
C. leave out D. give up
23. The businessman _______ a lot of money to the hospital, which was helpful to the development of it.
A. donated B. was donated
C. donate D. donation
24. As I waited for my brother to arrive, I _______ the clock and realized that he was late.
A. glanced at B. stared at
C. watched D. noticed
25. _______ English is concerned, he is first in our class.
[2011延吉高二检测]
A．As B．As soon as
C．As far as D．Now that
26. _______ regular exercise is very important, it’s never a good idea to exercise too close to bedtime.
[2011天津高考]
A. It B. As
