Air is all around us. It is around us as we walk and play. From the time we were born air is around us on every side. When we sit down, it is around us. When we go to bed, air is also around us. We live in air. We can live {#blank#}1{#/blank#} food or water for a few days, but we can't live for more than a few {#blank#}2{#/blank#} (minute) without air. We take in air.

    When we are working {#blank#}3{#/blank#} running, we need more air. When we are {#blank#}4{#/blank#} (sleep), we need less air .We live in air, {#blank#}5{#/blank#} we can't see it. We can only feel it when it {#blank#}6{#/blank#} (move). Moving air is called {#blank#}7{#/blank#} (windy). How can we make air move? Here {#blank#}8{#/blank#} (be) one way. Hold {#blank#}9{#/blank#} open book in front of your face, close it {#blank#}10{#/blank#} (quick). What can you feel? What you feel is air.

    “Early to bed, early to rise, makes a man healthy, wealthy(财富) and wise (智慧).”

    This is an old English saying (谚语)．Did you hear of it? It means that we must go to bed early and {#blank#}1{#/blank#} up early in the morning．Then we will keep {#blank#}2{#/blank#}．We'll also be rich and clever.

    This is true．The body must have {#blank#}3{#/blank#} sleep to be healthy．Children of young age should have ten {#blank#}4{#/blank#} sleep every day．Children who don't have enough sleep can't do their work very well．They won't be clever and they may not become rich!

    The body also needs {#blank#}5{#/blank#}．Walking, running, jumping, swimming and playing games are all exercise．Exercise the body strong(强壮).

    Exercise also helps the blood(血) to {#blank#}6{#/blank#} around inside the body．This is very important．Our blood {#blank#}7{#/blank#} food to all parts(部分) of our body．The head also needs blood． Exercise helps us to think{#blank#}8{#/blank#}.