单项选择题

The returned plastic bottles in New York used to______.

A．end up somewhere underground
B．be turned into raw materials
C．have a second life value
D．be separated from other rubbish
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单项选择题
It is commonly accepted in American society that too much sleep is______.
A．unreasonable
B．criminal
C．harmful
D．costly
单项选择题
The purpose of this article is to______.
A．ware 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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