How airplanes fly?

People {#blank#}1{#/blank#} (try) for a long time before they invented a {#blank#}2{#/blank#} (success) "flying machine". Now there {#blank#}3{#/blank#} (be) so many {#blank#}4{#/blank#} (plane) in the sky.

    An airplane {#blank#}5{#/blank#} (fly) because of the upward force(力量) of {#blank#}6{#/blank#} (move) air against its wings(翼). To get that moving air, it needs something {#blank#}7{#/blank#} (push) it forward—like a motor-driven propeller(螺旋桨) or a jet engine(喷气发动机). You can fly a kite if there  {#blank#}8{#/blank#} (be) enough wind to hold it up. An airplane is like a kite with such force!

    More and {#blank#}9{#/blank#} (many) young people are getting to like making model planes now. How about you? Are you interested in it after {#blank#}10{#/blank#} (read) this article?

    Hello! My name is John. I have a good friend. {#blank#}1{#/blank#} (他的) name is Eric. He is 14 years old. He is an English {#blank#}2{#/blank#} (男孩). He and I are in the {#blank#}3{#/blank#} (相同的) school. But I am in Class One, and he is in Class Two. He {#blank#}4{#/blank#} (喜欢) basketball. He thinks it is

{#blank#}5{#/blank#}(有趣的). Eric {#blank#}6{#/blank#} (有) two basketballs. We always play basketball {#blank#}7{#/blank#} (和…在一起) our friends after school. And Eric likes soccer, {#blank#}8{#/blank#} (也).He often {#blank#}9{#/blank#} (观看) TV at home in the {#blank#}10{#/blank#} (晚上).

Parents always {#blank#}1{#/blank#} their children {#blank#}2{#/blank#} {#blank#}3{#/blank#} computer games.