阅读下面短文，从短文后所给的四个选项中，选出可填入空白处的最佳选项．

　　One day I was visiting one of my friends in a big town． Suddenly 　　1　　 beautiful music came to my ears． My friend’s father quickly picked up　　 2　　 and went outside． I asked my friend，“　　 3　　 ？”My friend said that there was a truck　　 4　　 rubbish outside．

　　“ 　　5　　 someone throws in some rubbish，it gives out beautiful music． 　　6　　 other people hear it，they go out with their rubbish and 　　7　　”

　　“It is a　　 8　　 way to help keep our city clean．”said my friend．

　　　　9　　 our environment(环境) is very important． Wherever you　　 10　　 ，you can do something around your neighborhood．

　　Have you ever thrown any litter onto the ground? Have you ever draw pictures on　　 11　　 ? Have you ever spat　　 12　　 a public place? Have you ever cut down trees? If your answers are “　　 13　　 ”，it means that you have already helped protect our environment．

It is our duty to keep our environment　　 14　　 ． 　　15　　 everyone tries his best to protect(保护) the environment，the world will become much more beautiful．

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阅读理解

　　Mr.Green has a small garden in front of his house．There are lots of flowers in it．But he has only a few trees．

　　His neighbour Mr.Black has a garden,too．Mr.Black's garden is smaller than Mr.Green's．He has fewer flowers than Mr.Green but more trees．

　　Mr.Brown is Mr.Green's another neighbour．Mr.Brown's garden is the smallest one of the three．He has the fewest flowers of them all,but the weeds(杂草) in his garden are the tallest．There is always a lot of work to do in his garden,but Mr.Brown doesn't have enough time to work in his garden,so his garden is the worst．

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完形填空。

　　Food is very important．Everyone needs to 　　1　　 well if he or she wants to have a strong body．Our minds also need a kind of food．This kind of food is 　　2　　．We begin to get knowledge even 　　3　　 we are very young．Small children are 　　4　　 in everything around them．They learn 　　5　　 while they ale watching and listening．When they are getting older,they begin to 　　6　　 storybooks,science books…,anything they like．When they find something new,they love to ask questions and 　　7　　 to find out answers．What is the best 　　8　　 to get knowledge?If we learn by ourselves,we will get 　　9　　 knowledge．If we are 　　10　　 getting answers from others and do not ask why,we will never learn well．When we study in the right way,we will learn more and understand better．

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