Viết lại câu sao cho đồng nghĩa với câu trên :
1.People use a lot of vehicles.The air is polluted.
->If............................
2.He hasn't got his hair cut for two months.
-.>It has been.........................
3.Although Singapore is a developed country,it is not polluted by industry.
->Despite.............................
4.New Zealand and Australia are both surrounded by the sea.
->Both................................