问题标题:
【英语40.Thepopulationofthisisland______-inthelastfewdecades.40.Thepopulationofthisisland______-inthelastfewdecades.A.aredecreasingB.havedecreasingC.havebeendecreasingD.isdecreasing为什么】
问题描述:

英语40.Thepopulationofthisisland______-inthelastfewdecades.

40.Thepopulationofthisisland______-inthelastfewdecades.

A.aredecreasingB.havedecreasingC.havebeendecreasingD.isdecreasing

为什么

芦文龙回答:
  D   因为population是单数名词
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