on sale .at sale .for sale 的区别是什么?

on sale .at sale .for sale 的区别是什么? at a low price意思相同的是什么?A.at sale B.in sale C.on sale D.for sale on sale .at sale .for sale 的区别RT 给我仔细解释下 sale These clothes are very cheap.They are____________.A.on sell B.on sale C.at sale D.for sale on sale ,in sale ,for sale 的区别 on sale和for sale区别 FOR SALE 与ON SALE的区别 是on sale还是in sale This kind of mobile phone will be _____next month.A.in sale B.at sale C.on sale D.of sale sale 与 on for sale 和on ugg boots on sale 用“on sale造句 on sale 50 big sale/on on sale复数 what's on sale?