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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1796

Walmart,which is one of the largest American supermarket chains,___some of its stores open 24 hours on Mondays through Saturdays

A.keeps
B.keep
C.have kept
D.had kept
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Walmart,whichisoneofthelargest