几道高中的英语题，大家帮忙来解析一下...

1、A 是who had been punished 的省略，被动的省略
2、B 题目有点问题each of us has a role__in ，改了之后，答案是B
原因是：前面的will tell 说明是一个将来时，这种情况下应该用不定式的一般现在时
3、D be to 代表将会，财产要被继承，所以用is to be

1.The student_D_by his teacher went home in spirt.
A.punished B.have been punished C.being punished D.having been punished 强调动作的结果故用完成时态

2.She will tell us why she feels so strangly that each us has a rale_C_in making the earth a better place to live on .
A.to have played B.to play C.to be played D.to be playing
role 与play之间是被动关系,故用不定式的被动形式
3.The old man,who is now in his eighties,has made it clear that much of his weath__Dto the nation after his death.
A.has been left B.is to leave C.leaves D .is to be left
wealth与leave之间是被动关系 ,故用被动式
额..说明一下啊：这几题我都知道正确答案，但对于涉及到的语法还没搞得太清...所以，请大家帮忙，帮我解析一下！谢谢，我会加分的！