问题
选择题
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
答案
答案:D
考查时态。这里If Newton lived today 是一个虚拟条件从句,对后面主句的时间段没影响he would be surprised by what___ in science and technology 这个句子中,主语是what has discovered in science and technology, 这里的discover是延续到今的,至今为止所发现的科学技术,故选D。