一道题想不通！

liuxueya

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.
  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

the answer is C.why not D.

tongxun

D中有几个问题：
1、牛是养肥了再卖的。这样在选项C 中就有一个明确的因果表示（and then）在corral前面加上and突出的因果，而后面的哪个and就是连接的作用。
2、D中leave等动词的主语不明确，最起码不如C中的明确（C中是one养牛的）
3、D在系动词前面的描述是比较罗嗦的

oddyuibe

我觉得
1）D中用被动，显得很罗素，
2）THE ONLY THING和ALL ONE HAD TO DO意思不同，改变了原来合理的意思
SO, C IS BETTER

M012Smile

个人认为，这是个意思理解的问题。
里面的三个动词是leave, corral, drive。我认为，这三个动词的关系是一前一后的关系，不是并列关系，所以在leave和corral中间要用and，在corral和drive间要用and.
牛养肥了，才能corral；corral起来了，才能drive.