◎ 题干

30. —Why! I ____ get you on the phone.
— We ______ basketball on the playground when you phoned.
A.didn’t; must have been playing B.didn’t; must be playing
C.couldn’t; must have played D.couldn’t; must be playing
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“30. —Why! I ____ get you on the phone.— We ______ basketball on the playground when you phoned.A.didn’t; must have been playing B.didn’t; must be playingC…”主要考查了你对  【主谓一致】  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。