The men left as soon as they ______their orders.A had been given B are given C have been given

问题描述:

The men left as soon as they ______their orders.A had been given B are given C have been given
A had been given B are given C have been given D given

A 由句子中的left可知此处应用过去的时态,排除B和C(都表示现在).而given是个过去分词,不作谓语.本句缺少谓语动词,故用had been given.