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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 B. ask C. give D. get
( )2. A. not B. too C. to D. also
( )3. A. cut across B. climb up C. walk past D. look at
( )4. A. every B. many C. the first D. from
( )5. A. how big B. how long C. how old D. how much
( )6. A. trees B. leaves C. people D. rings
( )7. A. big B. thick C. small D. thin
( )8. A. climate B. trees C. rings D. animals
( )9. A. people B. things C. climate D. life
( )10.A. how B. why C. when D. while
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