Which of the following is not an example to show that cheating is becoming more and more common（）
A student pays another for doing a test paper.
B. A student writes down something to be tested before an exam.
C. A student gets well prepared in his studies before an exam.
D. A student gets homework from his classmate and then copies it.
10（）
A. ordered
B. demanded
C. required
D. suggested
7（）
A. coming
B. going
C. leaving
D. staying
The best title of the passage might be （）.
A. Pains and Ages
B. Differences in Ages
C. The Best Age to Be
D. Happiness and Ages
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