People＿＿dogs for millions of years.A.kept B.k

分类: 作业答案 • 2021-12-28 17:09:26

问题描述：

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

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.