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Our country has changed a lotin over a century.
A. in the past few years
B. in over ten years
C. in over 100 years.
答案:C
试题分析:句意:我们的国家在过去的一个世纪发生了很大的变化。in over a century100年; in the past few years在过去的几年里;in over ten years在过去的十年里; in over 100 years100年。根据题意,故选C。
考点:考查介词短语。