◎ 题干

21. To many teenagers the cellphone is not only _____useful tool but also ____ way to have fun and be cool.
A.the…the B.an…theC.a…a D.a… 不填
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“21. To many teenagers the cellphone is not only _____useful tool but also ____ way to have fun and be cool.A.the…the B.an…theC.a…a D.a… 不填…”主要考查了你对  【不定冠词】【定冠词】【零冠词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。