These days students in some schools not to use mobile phones. A. have asked B. will ask C

问题补充：

These days students in some schools not to use mobile phones.

A. have asked B. will ask C. are asked

答案：

解析：本题考查谓语动词。根据时间状语，these days，可知时态为一般现在时，又根据本题主语不能复数该动作，故用故选C。句意：在一些学校这些日子学生们要求禁止使用手机。

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