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一道英语单选题,Duringthecamping,usefiresonlywhenyou.A.mightB.couldC.mustD.will翻译

题目详情
一道英语单选题 ,
During the camping,use fires only when you ________.
A.might
B.could
C.must
D.will
翻译
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答案和解析
During camping,use fires only when you C.must