单项选择题

The purpose of this article is to ______.

A．warn us of the wickedness of napping
B．explain the danger of sleepiness
C．discuss the side effects of napping
D．convince the reader of the necessity of napping

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热门试题

单项选择题

The research done by the Dement commission shows that Americans ______.

A．don't like to take naps
B．are terribly worried about their national debt
C．sleep less than is good for them
D．have caused many industrial and traffic accidents

单项选择题

______ people sat in the car.

A．Six
B．Less than six
C．Seven
D．Five