英语40.The population of this island ______- in the last few decades.40.The population of this island ______- in the last few decades.A.are decreasing B.have decreasing C.have been decreasing D.is decreasing为什么

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英语40.The population of this island ______- in the last few decades.
40.The population of this island ______- in the last few decades.
A.are decreasing B.have decreasing C.have been decreasing D.is decreasing
为什么

D
因为population 是单数名词

D.
population是单数。因此排除ABC。

D
Population 在这里是人口数量,就是数字,当然是单数