◎ 题干
Over the past decades, the population in this country      because of the rising birth rate, immigration and the declining death rate.
A.has been increasing B.have been increasing
C.had increased D.have increased
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“ Over the past decades, the population in this countrybecause of the rising birth rate, immigration and the declining death rate.A.has been increasing B.have be…”主要考查了你对  【一般现在时】【将来进行时】【过去完成进行时】【过去将来时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。