选择题：47. (多选题) 按控制程度分，计划的前提条件为（ ）。(本题1.5分)A、 外部B、 内部C、

它需要政府私人团体的共同努力。

It is difficult to _____ the implication between the lines.Aget toBget intoCget

This last misunderstanding was all it took to ________ the relationship.A. sever

Alan passed the test because Alan had studied hard and understood the material.

It was in the city which we met each other ten years ago.