单选题：Why do a lot of young people use palnkillers without any wor

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题目内容：

Why do a lot of young people use palnkillers without any worry? A．Because palnkillers are prescribed.
B．Because palnkillers can be used in any quantity.
C．Because palnkillers have good quality.
D．Because painkillers can be used in any combination.

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分类：英语六级  题型：单选题
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