◎ 题干
---_____you _____ out the problem, Sam?
--- Not yet, but I’m going to.
A.Did, work B.Are, working C.Have, worked D.Will , work
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“---_____you _____ out the problem, Sam?--- Not yet, but I’m going to.A.Did, workB.Are, workingC.Have, workedD.Will , work…”主要考查了你对  【语音】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。