天山4－12大家选的什么，答案见文中，哪位NN能帮忙解释吗？多谢！

Q12:

For the farmer who takes care to keep them cool, providing them with high-energy feed,

and milking them regularly, Holstein cows are producing an average of 2,275 gallons of

milk each per year.

A. providing them with high-energy feed, and milking them regularly, Holstein cows

are producing

B. providing them with high-energy feed, and milked regularly, the Holstein cow

produces

C. provided with high-energy feed, and milking them regularly, Holstein cows are

producing

D. provided with high-energy feed, and milked regularly, the Holstein cow produces

E. provided with high-energy feed, and milked regularly, Holstein cows will produce

E是答案

这题选E你确定?

我选A

确实选E, 原因是：

班门弄斧一下：

确切的说做keep的补语是否用过去分词还要看是不是被动关系，在本题中显然provide和milk与牛都是被动关系，所以两个都要用过去分词，这样就排除A、B、C；

对于D和E的区别主要在于单复数，在keep后面是them来指代牛，所以牛一定是复数，因此选择E；