题目

我国少数民族集中分布的地区是(     ) A.东北、东南、西北 B.西南、西北、东北 C.西南、西北、东南 D.东北、西南、东南 答案:B. You have a big mouth, Tom.You _________ have told everybody the secret. [  ] A.shouldn't B.mustn't C.can't D.mightn't
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