No person carry a mobile phone into the examination room during the national 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。Shall可用于第三人称中表示：命令，警告，禁止、禁令中。B.must必须C.can 能够D.need需要，句意是：“没有人能够在高考时将手机带入考场。”答案A。