题目

 If Newton lived today, he would be surprise by what ____ in science and technology.A. had discovered     B. had been discoveredC. has discovered     D. has been discovered    答案：D解析：首先判断“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。.

查看本题答案和解析