◎ 题干
What do you think we should _____ improve our environment?  
[     ]
A. do
B. to
C. do for
D. do to
◎ 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“What do you think we should ______ improve our environment?[ ]A. do B. to C. do for D. do to …”主要考查了你对  【不定式】  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。