单项选择题

The main idea of this passage is that______.

A．large numbers of people do not need sleep
B．a person was found who actually didn't need any sleep
C．everyone needs some sleep to stay alive
D．people can live longer by trying not to sleep

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单项选择题

The doctors came to visit Jercy Page, expecting

A．to cure him of his sleeplessness______.
B．to find that his sleeplessness was not really true
C．to find out why some old people didn't need any sleep
D．to find a way to free people from the need of sleep

单项选择题

Electronic equipment causes all the following problems except that______.

A．personal information is given to strangers
B．children's eyes are harmed
C．news of the world is given to all people
D．family members don't talk to each other