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.

    It's Sunday today. The students of Class 3 are giving their classroom a good {#blank#}1{#/blank#}（clean）. Let's have {#blank#}2{#/blank#} look now. Miss Wang is {#blank#}3{#/blank#}（they） teacher. She is working with them. The {#blank#}4{#/blank#}（child） are very busy. Some are carrying water. Wang Hong is cleaning the windows; {#blank#}5{#/blank#}（other） are sweeping the floor.  Li Wei is putting up a map {#blank#}6{#/blank#}the wall. It is a map of China. Wu Peng is mending（修理） some broken chairs. The children are listening to the radio {#blank#}7{#/blank#}they are working.

    The classroom {#blank#}8{#/blank#}（look） nice and clean after the cleaning. The children are very happy. Listen, they are {#blank#}9{#/blank#}（sing） songs. It's time for lunch. They want {#blank#}10{#/blank#}（go） home for lunch now.