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 mild each per year. - providing them with high-energy feed, and milking them regularly, Holstein cows are producing
- providing them with high-energy feed, and milked regularly, the Holstein cow produces
- provided with high-energy feed, and milking them regularly, Holstein cows are producing
- provided with high-energy feed, and milked regularly, the Holstein cow produces
- provided with high-energy feed, and milked regularly, Holstein cows will produce
标准答案是E, 可我选A, 不知道错在哪里?
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