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。.