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?

    Layla and her family were driving to the town park. It was a hot day. She wanted to swim in the lake. As they got out of the car, Layla saw {#blank#}1{#/blank#} (she) friends.

    "Let's go into the water!" she called. All the kids jumped in {#blank#}2{#/blank#} (happy).

    Layla always has fun at the park. In spring, Layla's dad often takes her fishing in {#blank#}3{#/blank#}(冠词) lake. They usually go early in the morning. The lake water is still (平静的). It is different {#blank#}4{#/blank#} (介词) the river, which has water that runs by

    In summer, {#blank#}5{#/blank#} (family) have picnics near the lake. The kids play and swim in the lake.

    In the morning of autumn, the lake has fog (雾) over it. Layla's dad once{#blank#}6{#/blank#} (tell) her something about fog: Hot summer days warm the water, and then cool autumn air {#blank#}7{#/blank#} (move) over the lake's warm water. The water vapor(水蒸汽) in the air gets cool. It {#blank#}8{#/blank#} (become) small drops of water (水珠). We can see those drops of water hang in the air as fog.

    Layla loves winter at the park too. The cold {#blank#}9{#/blank#} (temperature) turn the water into ice. Many people go skating on the ice.

    The lake looks different at different times of the year, {#blank#}10{#/blank#} (连词) it is always a good place to have fun!

    My name is Jack. Today is {#blank#}1{#/blank#} 1st, Children's Day. It is my birthday, {#blank#}2{#/blank#} .I'm very happy. My {#blank#}3{#/blank#} (parent) buy a big cake for me. I'm twelve {#blank#}4{#/blank#} (year) old now. I like the cake very much. The cake {#blank#}5{#/blank#} (be) on the table, in the living room. I can see my name {#blank#}6{#/blank#} it. There are twelve candles(蜡烛) on it. My parents also buy some apples {#blank#}7{#/blank#} me. They are on the table, near the birthday cake. But I don't want {#blank#}8{#/blank#} (eat) the cake or the apples now. I invite(邀请) some of my good {#blank#}9{#/blank#} (friend) to my home, They' re coming soon. I want to eat the food with {#blank#}10{#/blank#} (they).