题目内容

【题目】At the awarding ceremony held in Tokyo, the scientists were surprised by what ______ in science and technology.

A. has discovered B. has been discovered

C. had discovered D. had been discovered

【答案】D

【解析】句意在东京举行的颁奖仪式上,科学家们惊讶于科学技术的发现。科学家们感到惊讶是过去式,故科学技术发现用过去完成时,what于动词discover是被动关系,故选D。

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