If Newton lived today, he would be surprise by what ____ in science and technology. A. had

If Newton lived today, he would be surprise by what ____ in science and technology.

A. had discovered B. had been discovered

C. has discovered D. has been discovered

答案

解析:

先判断“what”和“discover”之间为被动关系，排除A和C; 再从整个题干时态（lived, would be）判断是虚拟语气，表示与现在相反，故应选D，表示到目前为止所发现的。.

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If Newton lived today, he would be surprise by what ____ in science and technology. A. had

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