The horses are fed on grass.与 The horses feed on grass.请问哪句是

The horses are fed on grass.与 The horses feed on grass.请问哪句是 ____Have you fed the sheep on grass? （ ) 2.Please feed the grass the cow; cows feed grass.A.On;to in the grass 与on the grass的区别 Two sheeps are on the grass. 补充单词how many horses are there on the farm? bring on the dancing horses 歌词 (we) is on the grass. The children are fly kites on the grass.改错 Don it feed the grass Sit on the grass.还是 Sit in the grass? in the grass on the grass怎么区分?