◎ 题干
This machine is very easy ________. Anybody can learn to use it in a few minutes.
[     ]
A. operating  
B. to be operating
C. operated  
D. to operate
◎ 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“This machine is very easy ________. Anybody can learn to use it in a few minutes.[ ]A. operatingB. to be operating C. operatedD. to operate…”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。