问题
选择题
Recent campus tragedies show that safety measures are so important that we _______ take them too seriously.
A．can’t
B．should
C．mustn’t
D．shall
答案
答案：A
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Recent campus tragedies show that safety measures are so important that we _______ take them too seriously.
A．can’t
B．should
C．mustn’t
D．shall
答案：A