if newton still lived today,he would be surprised by what _____in science and technology.答案选择为has been discoverd.本人不太明白,为什么不用过去完成时呢?
问题描述：
if newton still lived today,he would be surprised by what _____in science and technology.
答案选择为has been discoverd.本人不太明白,为什么不用过去完成时呢?
答
首先这个句子是虚拟语气,意思是如果牛顿如果现在仍然活着（前半句与现在事实相反所以用lived）,他将会被现在的科学技术领域所发现的所震惊.这个发现的内容是今天现代发现的,所以用现在完成时.