the greenhouses on the farm each__ a glass roof

英语翻译The roof,the roof,the roof is on fire The roof,the roof, on the roof of a block of flats 可以改成on the roof of a flats' The old men work on a farm,they are ( )(farm) 英语翻译是at a farm 还是on the farm They------on the farm a moment ago. Is there a river on the farm Is there a river on the farm? on the farm On the farm作文 Animals on the farm: on farm on the farm 区别 They picked a lot of oranges on the farm.对on the farm提问 模板：(