There great changes in our hometown in the past fifteen years.A. has beenB. have beenC. w

问题补充：

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

A. has been

B. have been

C. was

D. were

答案：

A. has been

(答案→)B. have been

C. was

D. were

解析：考查时态。in the past +时间段，后用现在完成时态，根据题中的in the past fifteen years是现在完成的标志词之一，所以选B。