—Right. They are the ______ exchange students.

    As a boy I was always small for my age. I was five years younger than one of my brothers and seven years younger than the other. 1, I often felt left out when their friends came over to 2. I was too 3for whatever they were doing and they didn't want me to listen to their conversations either. More often than not I found myself outside playing  4and feeling forgotten.

    I remember one Spring afternoon I felt especially 5as I sat in the yard behind our house. We lived miles from town and I 6saw my own friends outside of school. I 7my brothers laughing from 8the house and felt a single tear coming down my face. At that moment I saw a large brown dog 9me. He was wagging (摇摆) his tail 10. He greeted me like a long lost11, licking (舔) my hand and sitting beside me on the grass,12he didn't know me. I petted and13this four-legged angel (天使). He let me pour out all my troubles and14my deepest thoughts before he kissed me goodbye. I went back inside feeling happy,15that no matter what life might hold I was loved. I16that the dog was sent in that moment of17to remind me just how much I was loved.

    In truth, nothing brings us greater18than knowing we are loved. Knowing we are loved gives us the19to love others as well. It also helps us to be the people the world meant for us to be. Remember how much the world loves you and share your20with the world.

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In our city, there is a big zoo. There are a lot of different animals in it. There are some scary(吓人的) tigers and lions. They like eating meat and they eat much meat every day.
There are also two big elephants and a baby(幼崽) one. Children like to ride one of them. The elephants are very kind and friendly. They eat much grass and bananas.
In the zoo, we can see different kinds of bears(熊): brown bears, black bears and white bears. They are all shy and clumsy(笨拙的). They stand on their back legs and lift their front legs to ask for food They like cakes very much.
Do you like pandas? There's only one in the zoo. Her name is Lingling. She is very cute. She likes eating bamboos a lot. She is kind of shy, She's very interesting and lovely.

某社区想扩建一片长方形绿地，如果长增加6米，面积就增加30平方米；如果宽增加3米．面积就增加24平方米，这片绿地的面积是多少平方米？