Question

 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

 

Answer 1

【答案】

 D

解析:根據(jù)時(shí)間狀語(yǔ)today可判斷出要現(xiàn)在完成時(shí),表示已經(jīng)完成的動(dòng)作或存在的狀態(tài)。再根據(jù)what與discover的關(guān)系可確定用被動(dòng)語(yǔ)態(tài)。If Newton lived today是虛擬語(yǔ)氣,意為“如果牛頓活到今天”。在科技方面的發(fā)現(xiàn)指的是現(xiàn)在的發(fā)現(xiàn)。過(guò)去完成時(shí)表示一個(gè)動(dòng)作或狀態(tài)在過(guò)去某一時(shí)間或動(dòng)作之前已經(jīng)完成或結(jié)束,也可能是早已完成或結(jié)束,即“過(guò)去的過(guò)去”。