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30．The accident happened the morning of May 1,2006． A．in B．a(chǎn)t C．on D．to3l．He was tired he didn’t hear the knock on the door． A. too,to B．so,that C．such,that D．enough,to 【查看更多】

 

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The accident happened __________ the morning of May 1,2006．

A．in          B．a(chǎn)t           C．on               D．to

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