◎ 题干
These days students in some schools ______ not to use mobile phones.
[     ]
A. ask
B. asked
C. are asked
D. were asked
◎ 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“These days students in some schools ______ not to use mobile phones. [ ]A. ask B. askedC. are asked D. were asked …”主要考查了你对  【被动语态】【一般现在时】  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。