完形填空。 We know that trees are uful in our everyday life. They

题文

完形填空。     We know that trees are uful in our everyday life. They __1__ us many things, such as wood,  oxygen, rubber, medicines and many other things. They can __2__ tell us a lot about our climate. The  following are the reasons. If you __3__ a tree, you can e that it has many rings. Most trees grow one  new ring __4__ year. Becau of the reason, we know __5__ a tree is. A tree over a hundred years old  means that it has more than a hundred __6__ . When the climate is dry or very cold, the trees do not  grow very much and their rings are usually __7__ . When it is wet and warm, the rings are much  thicker. If the rings are suddenly very thin or suddenly very thick, this means that the __8__ changed  suddenly. If we look at the rings on this tree, we can learn about the __9__ for a hundred years. We  can e __10__ our climate is changing today.(    ) 1．A．tell   (    ) 2．A．not   (    ) 3．A．cut across (    ) 4．A．every   (    ) 5．A．how big   (    ) 6．A．trees   (    ) 7．A．big   (    ) 8．A．climate (    ) 9．A．people   (    ) 10．A．how     B．ask  B．too  B．climb upB．manyB．how longB．leavesB．thickB．treesB．thingsB．why  C．give  C．to    C．walk pastC．the firstC．how oldC．people  C．smallC．ringsC．climateC．when  D．get          D．also         D．look at      D．from         D．how much     D．rings        D．thin         D．animals      D．life         D．while        

题型：未知 难度：其他题型

答案

1—5: CDAAC   6—10: DDACA

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