问题
单项选择题
People wandering in the fairground or park area（）wear a uniform.
A.must
B.mustn‘t
C.have to
D.don‘t have to
答案
参考答案：D
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People wandering in the fairground or park area（）wear a uniform.
A.must
B.mustn‘t
C.have to
D.don‘t have to
参考答案：D