单项选择题

There's no right amount of sleep for everyone，and generally sleep requirements de crease with age.

A．每个人都没有恰当的睡眠量，一般来说，睡眠需求会随着年龄增长而减少。
B．每个人所需的睡眠时间不尽相同，一般是随着年龄的增长而减少。
C．睡眠不足者需求的睡眠量一般都随着年龄而减少。
D．一个人没有固定的睡眠时间，一般会缩短寿命。
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单项选择题
The new idea about education in the U. S. is that ______.
A．everyone should get a college degree
B．it's no use for adults to go to college
C．a high school diploma is the end of education
D．adults should go on learning after graduating from school
单项选择题
What's the purpose for adults to continue their education
A．Enlarge their knowledge and learn new skills.
B．Catch up the opportunity to get a higher degree.
C．Learn more basic knowledge to get a diploma.
D．Make themselves live a more comfortable lif
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