Question

Great changes_____ in the small city in the last 20 years. A．have taken place B．took place .

Great changes_____ in the small city in the last 20 years. A．have taken place B．took place C．had taken place D．are happening

Answer 1

A

考查时态：时间是in the last 20 years，和现在完成时连用，句意是：在过去的20年里，这个小镇已经发生了巨大的改变。选A。