◎ 题干
 Vehicle designers are well aware that they need to ______ the idea of cars that have a low environmental impact.
A.end up withB.put up withC.keep up withD.come up with
◎ 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“Vehicle designers are well aware that they need to ______ the idea of cars that have a low environmental impact.A.end up withB.put up withC.keep up withD.come u…”主要考查了你对  【序数词】  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。