◎ 题干
With the help of high technology, more and more new substances _____ in the past years.

A. discovered
B. have discovered
C. had been discovered
D. have been discovered
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“With the help of high technology, more and more new substances _____ in the past years. [ ]A. discovered B. have discovered C. had been discovered D. have b…”主要考查了你对  【现在完成时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。
With the help of high technology, more and more new substances _____ in the past years. [ ]A. discovered B. have discovered C. had been discovered D. have b-高中英语-魔方格
◎ 题干
With the help of high technology, more and more new substances _____ in the past years.

A. discovered
B. have discovered
C. had been discovered
D. have been discovered
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“With the help of high technology, more and more new substances _____ in the past years. [ ]A. discovered B. have discovered C. had been discovered D. have b…”主要考查了你对  【现在完成时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。
With the help of high technology, more and more new substances _____ in the past years. [ ]A. discovered B. have discovered C. had been discovered D. have b-高中英语-魔方格
◎ 题干
With the help of high technology, more and more new substances _____ in the past years.

A. discovered
B. have discovered
C. had been discovered
D. have been discovered
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“With the help of high technology, more and more new substances _____ in the past years. [ ]A. discovered B. have discovered C. had been discovered D. have b…”主要考查了你对  【现在完成时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。