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I didn’t manage to do it_________ you had explained how.
A. unless                       B. until?
C. when                        D. since

B

根據句意,此處強調的是“直到……時候才”,故應用”until”,而形成”not…until…”結構。?

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科目:高中英語 來源:2011-2012學年度江蘇省啟東中學高一上學期期中考試英語卷 題型:閱讀理解

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短文填詞
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