In Awestern countries, teenagers Bexposed to Cmore drug education, but drug use is still Don therise.

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问题 In Awestern countries, teenagers Bexposed to Cmore drug education, but drug use is still Don therise.

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答案B

解析 此题考查并列句与独立主格结构的用法。“but”是并列连词,因此but前后的句子都应该是完整的句子。题中“Inwestern countries,teenagers exposed to more drugeducation”并非完整的句子,“exposed”是过去分词,与其逻辑主语“teenagers”构成独立主格结构,显然与后半句中的并列连词“but”的用法相悖,故将“exposed”改为“are exposed”。注:本句亦可改为独立主格结构作让步状语:“In western countries,teenagers exposed to moredrug education,drug use is still on the rise.”
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