The unemployment rate in this districtfrom 6% to 5% in the past two years.A. has fallenB.

问题补充：

The unemployment rate in this districtfrom 6% to 5% in the past two years.

A. has fallen

B. had fallen

C. is falling

D. was falling

答案：

(答案→)A. has fallen

B. had fallen

C. is falling

D. was falling

解析：考查时态，句子的时间状语是：in the past two years.而英语中in/during the past/last two /few years.都和现在完成时连用，句意是;这个地区的失业率在过去两年已经从6%下降到5%。选A。