There __________great changes in our hom...

There __________great changes in our hometown in the past fifteen years.

A. has been B. have been

C. was D. were

B 【解析】试题分析：句意：在过去的15年里，我的家乡发生了很大的变化。A和B选项是现在完成时态，C和D选项是一般过去时态。根据句意和句中的时间状语in the past fifteen years可知，这里应该用现在完成时。空后great changes是复数形式，故选B。考点：考查现在完成时。

考点分析：

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