导读:It was not until 1911,_______ the first vitamin was identifi It was not until 1911,_______ the first vitamin was identified,_______ people realized the importance of it.A.when; whichB.when;...
It was not until 1911,_______ the first vitamin was identifi
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
koala1004
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xwxkulou
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该名网友总共回答了14个问题,此问答他的回答如下:采纳率:85.7%
答案B
考查定语从句和强调句型.定语从句When the first vitamin was identified修饰先行词1911,因为句子很完整,使用关系副词when.第二空与it was构成强调句型.句意:正是知道第一批维他命被识别出来的1911年,人们才意识到它的重要性.故B正确."
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