◎ 题干
When and where to enjoy our summer vacation _____ yet.

[     ]

A. aren't decided
B. isn't being decided
C. hasn't been decided
D. haven't been decided
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“When and where to enjoy our summer vacation _____ yet. [ ]A. aren't decided B. isn't being decided C. hasn't been decided D. haven't been decided …”主要考查了你对  【现在完成时的被动语态】【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。