题目内容

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

试题答案

D
相关题目
查看习题详情和答案>>

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

查看习题详情和答案>>