[答案]
(1)can'tlive.(2)forafewdays.(3)air.(4)alittle.(5)don't;well.
[解析]
细节理解题。
(1)can't live.根据We need air.We can live without food or water for a few days ,but we can't live for more than a few minutes without air.可知。我们可以在没有食物和水的情况下生活几天。所以我们需要空气。故答案为can't live。
(2)for a few days.根据We need air.We can live without food or water for a few days .可知,我们可以在没有食物和水的情况下生活几天。
(3)air.根据Air is good for us ,but we can't see it.We can only feel it.可知,但我们看不见。所以我们只能感觉到空气。故答案为air。
(4)a little.根据When we are asleep,we also need a little air.可知,我们也需要一点空气。
(5)don't;well.根据When we have dirty air,当我们呼吸道肮脏的空气时。故答案为don't。
[点评]
本题考查了"人与社会   细节理解   ",属于"易错题",熟悉题型是解题的关键。