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

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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