Air is all around us.It is around us as we talk and play, From the moment we were born , we are surrounded(围绕) by air. When we sit down ,air is also around us ,we live in air . All living things need air:living things cann’t live without air. We can go without food or water for a few days ,but we can not live for more than a few minutes without air. When we are working or running ,we need some air. So we breathe faster than usual. When we are asleep, we need less air. 小题1:From the text ,we know that on the earth _____ A．there is air everywhere B．some animals don’t need air C．plants need more air D．for a long time people don’t need air. 小题2:The writer tells us that _____. A．there is less air on the earth than on the moon. B．the earth is covered with water C．the earth is covered with air D．there is no air on the earth. 小题3:Which of the following things need air ? A．land B．A mziror C．A cat D．A river. 小题4:Which of the flooowing is the first important thing for people’s lives ? A．water B．air C．food D．sunlight . 小题5:A man needs more air when he _____. A．dies B．runs fast C．takes a rest D．sleeps