英语40.The population of this island ______- in the last few decades.
问题描述：
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
答
D
因为population 是单数名词