T-4-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答案：E。请教下D和E两个选项的区别是什么呢？为什么选E而不是D呢？是不是E选项中有each导致前面的cows要用复数呢？我对这个语法点一点都不了解。。。。或者，D和E有什么其他的解题点呢？ | 
