It was not until 1911, the first vitamin was identified, people realized the importance of it．A．when; whichB．when; thatC．that; whichD．that; that 题目和参考答案——青夏教育精英家教网—

题目内容

It was not until 1911, _______ the first vitamin was identified, _______ people realized the importance of it．

A．when; which

B．when; that

C．that; which

D．that; that

解析

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增加：在缺词处加一个漏词符号 (∧) , 并在此符号下面写出该加的词。

删除：把多余的词用斜线 ( \ ) 划掉。

修改：在错的词下划一横线, 并在该词下面写出修改后的词。

注意：1. 每处错误及其修改均仅限一词；

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