No person carry a mobile phone into the examination room during thenational college Entrance Examinations．
A. shall
B. must
C. can
D. need
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(答案→)A. shall
B. must
C. can
D. need
解析：考查情态动词。句意“在高考期间，不允许学生带手机进入考场。”shall可表示命令、警告和允许等。must“必须”；can“可以”；need“需要”。故选A。