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    Children under 12 years of age in that country be under adult supervision when in a public library. A.must B.may D.need 【查看更多】

     

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    Children under 12 years of age in that country 　　　 be under adult supervision(监督) when in a public library.

    A.must　　　　　 B.may　　　　 C.can　　　　 D.need

     

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