大全885-18-11，看过讨论依然不明白，请N人指点，谢谢

18.It is an oversimplified view of cattle raising to say that all one has to do with cattle is leave them alone while they feed themselves, corral them, and to drive them to market when the time is ripe.
(A) all one has to do with cattle is leave them alone while they feed themselves, corral them, and to
(B) all one has to do with cattle is to leave them alone to feed themselves, to corral them, and
(C) all one has to do with cattle is leave them alone while they feed themselves and then corral them and
(D) the only thing that has to be done with cattle is leave them alone while they feed themselves, corral them, and
(E) the only thing that has to be done with cattle is to leave them alone while they feed themselves, to corral them, and

ANWER C

但是，我觉得没有一个选项是正确的，因为

（1）all.......is 怎么说的通？

（2）每个选项中的them和they指什么，总不能指cattle吧，因为cattle不是复数阿。

总体来说，如果是and 后有to，我觉得d更接近答案。（虽然被动语态不好，但不是不能用的。）

请牛人指点，谢谢！

那位朋友发表发表高见啊，急死我来了！

一直没人答复，看来真难啊。

all means "the only thing" in this question. leave them alone while they feed themselves, corral them, and to drive them to market when the time is ripe is treated as one thing here.

them and they are referring to the cattle because cattle is a plural term, just like "people".

谢谢
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andrew！

基本清楚了！只是ALL的用法很怪！