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.

    “Today is my birthday”, Sarah said. “I hope there will be a big party {#blank#}1{#/blank#} all my friends!” She looked around the house,{#blank#}2{#/blank#} nobody was there. She was sad that her parents and friends forgot{#blank#}3{#/blank#}(she) birthday.

She decided to have a party on her own. “I'll invite my dolls and my favorite Teddy Bear to my party.” Sarah gave all her dolls a ride to the party in her wagon(马车). She also {#blank#}4{#/blank#} (make) a cake by{#blank#}5{#/blank#} (she).

    “Now I need a special gift for my birthday! It will be the most beautiful gift I have had!” Sarah said proudly, but she began to feel sad again{#blank#}6{#/blank#} her friends were not at her party. Then she ran upstairs to prepare the gift. When she {#blank#}7{#/blank#} (come) back, nothing was there! “Where is my cake? Where are my dolls?” She was{#blank#}8{#/blank#} (surprise). Just then, her parents and friends came out. “Surprise, Sarah! Here is your birthday party,” they said{#blank#}9{#/blank#}(happy). Of course they didn't {#blank#}10{#/blank#} (forget) her birthday!

    Exercise comes from a Latin word that means" to keep busy". Keeping busy is a way of keeping healthy. You need exercise {#blank#}1{#/blank#} your mind, your body, and your social skills（交际能力）.

    Exercising your mind

    Exercise {#blank#}2{#/blank#} improve your mind. Everyone should do some mental（智力的）exercises every day. These {#blank#}3{#/blank#} of exercises help you think clearly. They help you solve problems quickly and {#blank#}4{#/blank#}. They kelp you study and learn new things to make life more {#blank#}5{#/blank#}.

    You can do mental exercises by yourself {#blank#}6{#/blank#} with other people. You can read and think by yourself. You can also play a thinking game with your family.

    Exercising your body

    Exercise helps keep your body healthy. A healthy body helps you sleep well and work well. Physical exercise {#blank#}7{#/blank#} you look and feel fit and healthy.

    Some kinds of physical exercise {#blank#}8{#/blank#} your whole body. These include walking, running, jumping rope and swimming. Playing sports is still another way to keep your body in good shape. It exercises {#blank#}9{#/blank#} mind, too.

    Exercising your social skills

    Exercise helps you improve your social skills. Social exercises help you learn to make friends.

    Working and playing with {#blank#}10{#/blank#} are two ways to improve your social skills. They help you learn cooperation（合作）. The more you work at improving your skills, the more successful you'll be.