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People.dogsaspetsformillionsofyears.A.tokeepB.haskeptC.keepD.havekept
题目详情
People .dogs as pets for millions of years.
A.to keep B.has kept C.keep D.have kept
A.to keep B.has kept C.keep D.have kept
▼优质解答
答案和解析
选D
看到for说明是完成时
People又泛指人们 所以不是单数
看到for说明是完成时
People又泛指人们 所以不是单数
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