____ is known to us is that Yuan Longping called "the father

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/22 13:01:28

____ is known to us is that Yuan Longping called "the father of hybrid rice" ,for ____ life was hard in the past ,still works very hard in his seventies.
A.As;whom B.What;whom C.It;whose D.As;whose
给的答案是B,最好能分析一下其它选项,

What引导主语从句
Whom表示前面的袁隆平因为那人做宾语所以这个也是宾格的
如果一开始用AS的话后面也不会这么表达啊会这样说的 as is known to us,yuanlongping……而不是这样这就是主语从句的形式~
而whose是表示某人的…… 句意明显看出来前面有for 所以说的是对……而言过去的生活是很艰辛的
it也是同理如果用it的话就要表达成it is known to us that……
不懂再补充问题吧

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