I was doing my homework,my mother was cooking in the kitchen

问题描述:

I was doing my homework,my mother was cooking in the kitchen
A While B When C AfterD Before
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1个回答 分类:英语 2014-10-12

问题解答:

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B是最佳的 A有转折意思 CD前后时态不一样时才用.
 
 
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