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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1573

Since 1949, the peoples living standard _______, causing a big _______ in population.

A.has been raised; rise B.has been rose; raise
C.has raised; rise D.has raised; rose
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Since1949,thepeopleslivingstan