【題目】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：在東京舉行的頒獎(jiǎng)儀式上，科學(xué)家們驚訝于科學(xué)技術(shù)的發(fā)現(xiàn)�？茖W(xué)家們感到驚訝是過(guò)去式，故科學(xué)技術(shù)發(fā)現(xiàn)用過(guò)去完成時(shí)，what于動(dòng)詞discover是被動(dòng)關(guān)系，故選D。

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