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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1115

The world’s population has grown by ______ it was in 1800.  

A.more than six times that B.six times more than that
C.more than six times what D.six times as many as
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Theworld’spopulationhasgrownby