1. A number of houses were burnt down in the fire .好些房子给烧毁了。 2. The house burnt down in half an hour .那所房子在半小时之内就被焚为平地。 3. The guerrillas burned down the enemy 's depot .游击队放火烧了敌人的仓库。 4. The room grew colder as the fire burnt down .随着炉火逐渐减弱，房间越来越冷。5. The candle had burned down to the socket of the candlestick .蜡烛一直烧到烛盘底上。
