Bob would have helped us yesterday, but he ________.
A.was busy
B.is busy
C.had been busy
D.will be busy
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◎ 解析
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◎ 知识点
根据魔方格专家分析,试题“Bob would have helped us yesterday, but he ________.A.was busyB.is busyC.had been busyD.will be busy…”主要考查了你对 【一般现在时】,【将来进行时】,【过去完成进行时】,【过去将来时的被动语态】 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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