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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

答案:D
提示:

discovered与what的关系决定了用被动式,排除A、C项,从题意知,动作不可能发生在牛顿之前,故排除B项。D项表示现代科技的状况。


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