52单词网 > 高中英语 > 高中英语题库 > The Bunsen Burner is so named because it is thought by Robert Bunsen． [ ] A． to

The Bunsen Burner is so named because it is thought by Robert Bunsen． [ ] A． to

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The Bunsen Burner is so named because it is thought by Robert Bunsen． [ ] A． to

The Bunsen Burner is so named because it is thought _________ by Robert Bunsen．

[]A．

to be invented

B．

having been invented

C．

invented

D．

to have been invented

试题答案

答案：D

标签：namedsoitbecausebunsen

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