1、___in a friendiy way , their quarrel came to an end.Abeing settled Bhaving settledCsettled答案选C，AB为社么不可以呢什么时候可以用B答：settle是个及物动词，如settle the problem. 意为解决问题。 settle their quarrel 是动宾关系。反过来，their quarrel was settled down 就是主谓被动关系了。C.= As their quarrel was settled in a friendly way, their quarrel came to an end....
