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
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
D
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。.