After ___the rubbish away,the boy ran back to his seat.A throw B throwing C have thrownD being thrown应该选哪个?为什么?

问题描述:

After ___the rubbish away,the boy ran back to his seat.A throw B throwing C have thrown
D being thrown
应该选哪个?为什么?

选择B
这里首先知道,介词after后面加上动词ing形式,所以排除了A和C
另外要明白后面句子的主语the boy和throw(仍)是主动的关系,所以排除被动的D
综上,选择B