单项选择题

In the last paragraph the author points out that

A．sleeping less is good for human development.
B．people ought to be persuaded to sleep less than before.
C．it is incorrect to say that people sleep too little.
D．those who can sleep less should be encouraged.

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单项选择题

The author disagrees with Dr．Burton because

A．few people can wake up feeling fresh and alert.
B．some people still feel tired with enough sleep.
C．some people still feel sleepy with enough sleep.
D．some people go to bed very late at night.

单项选择题

Which of the following statements is INCORRECT

A．Computertowns in the UK have become popular.
B．Computertowns and clubs cater for different people.
C．Computertowns are more successful than clubs.
D．It's better that computertowns and clubs work together.