It is required that students mobile phones at school, so seldom them using one.
A. don’t use; will you see
B. should not use; you will see
C. not use; will you see
D. can’t use; will you see
网友回答
A. don’t use; will you see
B. should not use; you will see
(答案→)C. not use; will you see
D. can’t use; will you see
解析：
第一空填not use是虚拟语气的用法：句型It‘s required that从句中用（should）+动词原形，第二空是倒装句的用法，seldom“很少”置于句首时，句子用部分倒装，will放在主语前面。选C。