阅读理解

　　We all need to exercise．Doctors say it is good for us．It makes our heart and body strong．It also gives you more energy(能量)．And you will feel better about yourself．It's best to exercise twice a week．Twenty minutes each time is enough．

　　There are many ways to exercise．You can walk, run, play sports or swim．Many people go to special places to exercise．They are called “fitness centers”．These places have a lot of equipment(设备)．Some people buy equipment for their homes．But it's very expensive．

　　Exercises can be fun．Friends can exercise together at fitness centers．Or they can play sports together．How do you exercise? How often do you exercise?

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阅读理解：

　　The world is not only hungry, but it is also thirsty for water．This may seem strange to you, since nearly 70% of the earth’s surface is covered with water．But about 97% of that is sea water or salt water．Man can only drink and use the other 3% the fresh water from rivers, lakes, underground and other sources．And we can not even use all of that．Even worse, some of it has been made dirty．

　　However, as things stand today, this fresh water is still enough for us．But our need for water is becoming larger and larger quickly, almost day by day．We should take steps to do with this problem now and in this way we can get away from a serious world-wide water shortage(缺少)later on．

　　We all have to learn how to stop wasting our valuable water．One of the first steps is to develop ways of reusing it．Today in most large cities, water is used only once and then sent out into a sewer system(下水道)．From there it returns to sea or runs into underground places．

　　But even if every large city used its water, we still would not have enough．All we’d have to do to make use of sea water in the world is to remove the salt．If we take these steps we’ll be in no danger of drying up．

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　　I stood there listening to my father shout at top of his voice．The look on his face said that one of us had done something 　　1　　．

　　“Which one of you did this?”

　　We all looked down at the 　　2　　．There was child’s handwriting in chalk there．I was filled with a lot of 　　3　　．I hoped no one could see it．Would he guess it was me?I was so worried．When he asked me, I lied,“Not me, Dad．”

　　The others denied(否认)it as well．Of course, we all knew that one of us 　　4　　 have done it．But as the youngest and smallest of the three, I just couldn’t find the courage to tell the truth．

　　To 　　5　　 who had written on the step, Father gave us each a piece of paper and a pencil．“I want each of you to 　　6　　 exactly what you see on the step．”I tried my best to write the words 　　7　　．I didn’t want Dad to be able to tell it was me．

　　He 　　8　　 our pieces of paper and looked at them．“　　9　　 none of you will admit(承认)to have done it, then I will punish you all．”I stood there and said nothing．The last thing I wanted was for Dad to 　　10　　 me!

　　“I did it．”My sister stepped forward and said 　　11　　 had done something she hadn’t．She was grounded for a month．

　　We didn’t talk about that day for man years．Not until we were all older and I knew it was 　　12　　 to finally tell my dad it was really me．I always felt sorry because of it．That was the last time I let anyone take the blame for me．

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