◎ 题干
— I haven't finished my essay because the computer broke down when I was downloading the
required data last night.
— Really! You could have turned to me. I         mine.
[      ]
A. didn't use
B. won't use
C. hadn't used
D. wasn't using
◎ 答案
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◎ 解析
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◎ 知识点
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