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题目
题型:不详难度:来源:
The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen.
A.to be inventedB.having been invented
C.inventedD.to have been invented

答案
D
解析
本句考查动词的被动语态和时态,it+is+动词ed形式,to do是固定的搭配用法。而Bunsen Burner的发明是过去发生的动作,所以用完成时态。
核心考点
试题【The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen】;主要考察你对句式等知识点的理解。[详细]
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