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外语
The Bunsen burner is so named because it is thought ______ by Robert Bunsen, who was German by birth.
The Bunsen burner is so named because it is thought ______ by Robert Bunsen, who was German by birth.
admin
2012-11-22
28
问题
The Bunsen burner is so named because it is thought ______ by Robert Bunsen, who was German by birth.
选项
A、having been invented
B、to be invented
C、to have been invented
D、being invented
答案
C
解析
本句是It is thought that...这一句型的变体。由于不定式的动作发生在“It is thought…”之前,因此不定式采用完成式。另外,这里的“让”指代“The Bunsen burner”而不是充当形式主语。
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专业英语四级
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