To understand why the Earth is warming up.{#blank#}1{#/blank#}  (one) of all, we need to understand why it is warm. Our planet {#blank#}2{#/blank#} (cover) with atmosphere(大气）.Sunlight passes  {#blank#}3{#/blank#} (通过) the atmosphere and reaches the Earth. The Sun heats up the  {#blank#}4{#/blank#}  (Earth) surface. When the heat rises into the air, it is stopped by some special gases in the atmosphere like CO₂, the{#blank#}5{#/blank#}  (hot) returns to the Earth and keeps it{#blank#}6{#/blank#}  (warm) .

Power stations and cars release (释放) so {#blank#}7{#/blank#}  (much) greenhouse gases every day. So we can help stop global (全球的) warming by using less electric things such as{#blank#}8{#/blank#} (关掉) lights when we leave a room, or asking our parents to turn down the heating in our house{#blank#}9{#/blank#}  (save) energy. We can also stop global warming by finding other{#blank#}10{#/blank#}  (way) of transportation. For example, ride a bicycle or walk instead of going by car. Another way to help stop global warming is to plant and care for trees. Because trees take in CO₂, they are our best friends when fighting against global warming.

看家谱图，填入恰当的单词将短文补充完整。

    I have（有）a good friend. His name is Jim. There are（有）nine people（人）in his family. His {#blank#}1{#/blank#}  have two sons, his{#blank#}2{#/blank#}  and his {#blank#}3{#/blank#} . His parents have two {#blank#}4{#/blank#}  and two {#blank#}5{#/blank#} . The two girls are Gina and Jane, and the two boys are Jim and Eric. So Jim has（所以吉姆有）two sisters and brother. Jim loves his family. His family love him, too.

    More and more people like bicycling and it is no surprise. It is amazing， healthy and good for the environment. Maybe that's w{#blank#}1{#/blank#} there are l. 4 billion bicycles and only 400 million cars on roads worldwide today. Bikes can t  {#blank#}2{#/blank#}  you almost anywhere， and there is no oil cost!

    Get on a bicycle and r{#blank#}3{#/blank#} around your neighborhood. You may discover something new all around you. Stopping and getting off a bike is e{#blank#}4{#/blank#} than getting out of your car. You can bike to work and enjoy exercise w{#blank#}5{#/blank#} polluting the environment.

    You don't even have to ride all the way. Folding(折叠) bikes work well for people who take the train. Just fold the bike and take it with you. You can do the s{#blank#}6{#/blank#} on a plane. A folding bike can be packed in a suitcase. You can also take a small bike with you when you fly. But be s{#blank#}7{#/blank#} to look for information on the airline websites.

    Bicycling is good for your health. It helps c{#blank#}8{#/blank#} your weight and prevent heart diseases. If you go to and r{#blank#}9{#/blank#} from work by bike three times a week for 15 minutes， you'll lose five kilos of fat in a year. It can a{#blank#}10{#/blank#} improve your mood. Exercise like bicycling has been shown to make people feel better， more relaxed and confident.

    A man once advertised for a person to work in his office, and nearly fifty people applied for the place. From all the applicants (应聘者) , in a short time, he chose a boy and {#blank#}1{#/blank#}.

    "I would like to know," said a friend, "how you came to choose that boy, He had not a single recommendation (推荐信) with him."

    "You are mistaken." said the man. "He had {#blank#}2{#/blank#}." "He cleaned his shoes before he came in, and{#blank#}3{#/blank#}after him, showing that he was tidy and orderly."

    "He gave up his seat at once to an old man, showing that he was{#blank#}4{#/blank#}."

    "He took off his cap when he came in, and answered my questions politely,{#blank#}5{#/blank#}."

    "He lifted up the book which I had purposely laid on the floor, and put it on the table,{#blank#}6{#/blank#} all the others stepped over it, or pushed it aside, showing that he was {#blank#}7{#/blank#}."

    " And he waited quietly for his ture, {#blank#}8{#/blank#} showing that he had good manners."

    "When I talked with him, I noticed that his clothes were carefully brushed, his hair in nice order, and his teeth as white as milk."

    "When he{#blank#}9{#/blank#}, I noticed that his fingernails were clean, instead of being tipped with pen."

    "Don't you call these things letters of recommendation? I do and what I can tell about a boy,{#blank#}10{#/blank#}for ten minutea,is worth more than all the well-prepared letters he can bring me."