—Is Bob doing his homework? —No, he __. He is __ a letter.
[ ]
A. doesn't, write B. isn't, writes C. isn't, writing D. isn't, writeing
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根据魔方格专家分析，试题“—Is Bob doing homework? —No, he ______. He is ______ a letter. [ ]A. doesn't,write B. isn't, writes C. isn't, writing D. isn't, writeing …”主要考查了你对 【系动词】，【现在进行时】 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。
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