第二部分英语知识运用（共两节，满分45分）
第一节单项填空（共15小题；每小题1分，满分1 5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，并在答题卡上将该项涂黑。
21. -How good the news is for you!
-________.
A. You are friendly to tell me B. I'm glad to see that
C. It's kind of you to say so D. It's nice to hear
22. A discovery is said to be ______accident meeting _______prepared mind.
A. the; a B. an; a C. the; the D. a; the
23. According to scientists, our mental abilities begin to______ from the age of 27 after reaching the highest level at 22.
A. differ B. decline C. fail D. shrink
24.- Hey! Here is a message on my cellphone, telling me that I have won the first prize of a weekend for two in Paris.
-Delete it! It's a trick. Many a person ______by such tricks.
A. has been cheated B. have been cheated
C. were cheated D. was cheated
