the film____ for five minutes already. A began B has been on C begins D has begun说明原因

问题描述:

the film____ for five minutes already. A began B has been on C begins D has begun
说明原因

B has been on
因为是现在完成时,所以用has+过去分词.
has been on 就是已经上映了多少时间 on 上映