问题补充：
Great changes in my hometown and a lot of factories .
A. have been taken place , are being set up
B. have taken place , have been set up
C. are taken place , had been set up
D. had taken place , will be set up
答案：
A. have been taken place , are being set up
(答案→)B. have taken place , have been set up
C. are taken place , had been set up
D. had taken place , will be set up
解析：句意：我的家乡的变化可大了，许多工厂也建立了
汉语的语法具有隐含性，句中暗含了变化已经发生，并且其结果就是很多工厂已经修建了。
现在完成时的其中的定义就是过去的动作对现在产生的结果或影响。
据此可知，B正确
