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People__dogs for millions of years.A.kept B.k
People__dogs for millions of years.A.kept B.keep C.has kept D.have kept
人气:127 ℃ 时间:2019-09-01 05:06:28
解答
D,people单复数同行,应该说很多人养狗,for后加一段时间用现在完成时态.
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