◎ 题干
New technology _____ to make sure the cars, taxis, buses and trains we use _____ the air.

A. is used; not to pollute
B. has used; is not polluted
C. is being used; do not pollute
D. has been used; not pollute
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“New technology _____ to make sure the cars, taxis, buses and trains we use _____ the air. [ ]A. is used; not to pollute B. has used; is not pollutedC. is b…”主要考查了你对  【现在进行时的被动语态】【宾语从句】  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。