【题目】Great changes _______ in his hometown in the last twenty years.
A. were taken place B. have taken place
C. have been taken place D. took place
在线课程【答案】B
【解析】试题分析：考查时态。句意：在过去的20年里，他的家乡发生了巨大的变化。本句中的关键词是in the last twenty years，该时间状语通常和现在完成时连用，而且take place没有被动语态的形式，故B正确。