以what do you think it the most serious challenge of living in a big city为话题,写一篇英语对话.要求两人对话,80字以上
问题描述：
以what do you think it the most serious challenge of living in a big city为话题,写一篇英语对话.要求两人对话,80字以上
答
应为：what do you think is the most serious challenge of living in a big city?A:So crowed the street is !I'm afraid we'll be late for work again.B:I'm afraid so.I think traffic is the most serious cha...