阅读理解。

　　Do you still get free plastic bags from the supermarkets?Things have changed．

　　China has banned(禁止)free plastic bags at shops and supermarkets, and people have to pay for using plastic bags．The rule started on June 1．It came because our country tried to make litter less．Making super-thin(超薄)plastic bags has also been banned．

　　The Chinese once used about 3,000,000,000 plastic shopping bags a day, and they have caused pollution of the environment 环境污染)．The bags have become a main cause of plastic pollution because they are easy to break and people throw them away here and there．So the Chinese people are encouraged to bring theft own bags for shopping．

　　What kind of shopping bag is the best to bring?Some students in Chongqing have a good idea．They make their own shopping bags．They use old clothes to make cloth bags(布袋), and send them to their parents as presents．They also ask theft parents and friends to use cloth bags instead of plastic ones．They think it is their duty to protect(保护)the environment．

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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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