______Math book,they'er_____books.A.Their;______Math book,they'er_英语解答

______Math book,they'er_____books.A.Their;
______Math book,they'er_____books.A.Their;they B.They're;their C.Them;their D.They;them's

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解答

B
第一个空是他们是..第二个是他们的（用物主代词）哦谢谢