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-----_________ you ________ your homework yet? 
-----Yes, I ________ it ten minutes ago.
A. Did; do; finished      B. Have; done; have finished        C. Have; done; finished

科目 英语   题型 单选题   难度 较易
知识点: 主语+系动词+表语 一般疑问句 时态辨析
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