◎ 题干
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
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen.A.to be inventedB.having been inventedC.inventedD.to have been invented…”主要考查了你对  【therebe句型】  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。