We know that trees are useful in our everyday life. They give us   1   things, such as wood, oxygen, rubber（橡胶）, medicines   2   many other things. They can also tell us a lot about our climate. The following are the reasons. If you cut   348   a tree, you can see that it has many rings. Most trees grow one new ring   4   year. Because of this, we know how old a tree is. A tree over a hundred   5   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   7   usually thin. When it is wet and warm, the rings

8  thicker. If the rings are suddenly very thin or suddenly very thick, it means that the 9  changed suddenly. If we look at the rings on the tree, we can learn about the climate in the past years. We can see

  10   changing today.

1.A．much               B．lot                  C．many        

2.A．so                 B．and                  C．while       

3.A．down               B．cross                    C．into        

4.A．every              B．many             C．some        

5.A．year old           B．old                  C．years old       

6.A．plants             B．rings                    C．leaves      

7.．A．is                   B．are                  C．were        

8.A．are much               B．are more             C．is much     

9.A．day                    B．year                 C．climate     

10.A．how our climate is    B．how is our climate   C．how to our climate

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.

We know that trees are useful in our everyday life. They give us   1  things, such as wood, oxygen, rubber（橡胶）, medicines   2  many other things. They can also tell us a lot about our climate. The following are the reasons. If you cut   348  a tree, you can see that it has many rings. Most trees grow one new ring   4  year. Because of this, we know how old a tree is. A tree over a hundred   5  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   7  usually thin. When it is wet and warm, the rings
8  thicker. If the rings are suddenly very thin or suddenly very thick, it means that the 9  changed suddenly. If we look at the rings on the tree, we can learn about the climate in the past years. We can see
  10  changing today.
【小题1】A．much               B．lot                 C．many        
【小题2】A．so                 B．and                 C．while       
【小题3】A．down               B．cross                   C．into        
【小题4】A．every              B．many            C．some        
【小题5】A．year old            B．old                 C．years old       
【小题6】A．plants             B．rings                   C．leaves      
【小题7】．A．is                B．are                 C．were        
【小题8】A．are much               B．are more            C．is much     
【小题9】A．day                B．year                C．climate     
【小题10】A．how our climate is     B．how is our climate   C．how to our climate

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

　 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.