摘要: cut across抄近路 cut down砍倒.削减 cut off切断.割掉.断绝关系 cut up连根拔除.切碎 through剪断.凿穿 cut out删(省)掉.戒掉 cut in插嘴 1) Don't cut this tree. It will be very shady in summer. 2) You must cut the number of cigarettes you smoke, or it will cause illness. 3) We decided to cut the moor to the village. 4) Cutting the tree means cutting the tree into pieces. 5) The electricity was cut when the lady refused to pay the bill. 6) We were having a pleasant conversation when Tom cut . (down, down, across, up, off, in )

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We know that trees are useful in our everyday life. They   1   us many things, such as wood, oxygen(氧气), rubber, medicines and many other things. They can   2   tell us a lot about our climate. The following are the reasons. If you cut across a tree, you can   3   that it has many rings. Most trees grow one   4   ring every year. Because of this 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(干燥的) or very cold, the trees do not grow very much and their rings are usually   7  . When it is wet and   8  , the rings are much thicker. If the rings are suddenly very thin or suddenly very thick, this means that the    9   changed suddenly. If we look at the rings on the trees, we can   10   about the climate for a hundred years. We can see how our climate is changing today.

1.                A.give           B.ask            C.get  D.tell

 

2.                A.too            B.as well          C.either    D.also

 

3.                A.hear           B.feel            C.see D.look

 

4.                A.new           B.old            C.young    D.short

 

5.                A.how tall        B.how old         C.how long D.how far

 

6.                A.leaves          B.apples          C.rings D.trees

 

7.                A.big            B.thin            C.thick(厚的)    D.long

 

8.                A.cold           B.cool            C.hot D.warm

 

9.                A.climate         B.things          C.people   D.life

 

10.               A.think          B.talk            C.learn D.change

 

 

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     We know that trees are useful 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 see that it has many rings. Most trees grow one
  new ring __4__ year. Because 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 see __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 up
B.many
B.how long
B.leaves
B.thick
B.trees
B.things
B.why  
C.give  
C.to    
C.walk past
C.the first
C.how old
C.people  
C.small
C.rings
C.climate
C.when  
D.get          
D.also        
D.look at      
D.from        
D.how much    
D.rings        
D.thin        
D.animals      
D.life        
D.while        
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