Hurry up! The play for half an hour.A. has been onB. has beganC. has begunD. had begun

问题补充：

Hurry up! The play for half an hour.

A. has been on

B. has began

C. has begun

D. had begun

答案：

(答案→)A. has been on

B. has began

C. has begun

D. had begun

解析：句意：快点！演出已经开始半个小时了。结合语境可知本句描述的是现在已经完成的动作，故用现在完成时态。英语完成时态中瞬间动词不能和表示一段时间的时间状语连用，begin表示瞬间动作，故选A。