The sky usually looks light b{#blank#}1{#/blank#}. If you go to the top of the highest mountain, there is less a{#blank#}2{#/blank#} between you and the sun to scatter (分散) the sunlight, the sky would be dark blue. If you take a space s{#blank#}3{#/blank#} high above the earth, there is no air at a{#blank#}4{#/blank#} to scatter the sunlight, the sky would be so dark that it would be black.

    Sometimes the sky doesn't l{#blank#}5{#/blank#} blue. A sunrise (日出) and sunset (日落), the light from the s{#blank#}6{#/blank#} is scattered in such a way that you see red, orange, and other colors in the s{#blank#}7{#/blank#}.

    Cathy is a middle school student. She is twelve. She is a good student. She gets up very early every morning. She reads English for twenty minutes and then she has breakfast. She often has milk and bread for breakfast.

    At seven she leaves home for school. She goes to school on foot. She doesn't go to school by bus. She says that buses are too crowded and sometimes they are slow. It doesn't take her long to walk to school. It only takes her twenty minutes.

My brother {#blank#}1{#/blank#} {#blank#}2{#/blank#} to drink too much coke.

Kitty {#blank#}1{#/blank#} {#blank#}2{#/blank#} much meat at night.