◎ 题干
If Newton lived today, he would be surprised by what ______ in science and technology.  
[     ]
A. had discovered      
B. had been discovered  
C. has discovered      
D. has been discovered
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“If Newton lived today, he would be surprised by what ______ in science and technology. [ ]A. had discoveredB. had been discovered C. has discoveredD. has be…”主要考查了你对  【现在完成时的被动语态】  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。