◎ 题干
Our town________poor in the past,but great changes________in the town in the past three years.
[     ]
A. was; had taken place  
B. was; have taken place
C. has been; had taken place  
D. has been; have taken place
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Our town________poor in the past,but great changes________in the town in the past three years. [ ]A. was; had taken place B. was; have taken placeC. has be…”主要考查了你对  【一般过去时】【现在完成时】  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。