His father told me that he for the United States three days .A. has left; agoB. had left

问题补充：

His father told me that he for the United States three days .

A. has left; ago

B. had left; ago

C. left; ago

D. had left; before

答案：

A. has left; ago

B. had left; ago

C. left; ago

(答案→)D. had left; before

解析：考查过去完成时，句意是：他爸爸告诉我他三天前去了美国。说明在他爸爸告诉我前他去了美国，用过去完成时，和过去完成时连用表示“三天前”用three days before，表示过去某个时间前的三天，选D。