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4.  A. by            B. with                   C. use              D. have

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3.  A. but           B. so               C. and             D. as

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2.  A. five thousands  B. five thousand of    C. four thousand     D. five thousand

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1.  A. youngest       B. biggest          C. oldest            D. smallest

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16. We have never seen _____ exciting match.

  A. such            B. so               C. such an          D. so an

完型填空

A pine tree in California was thought to be the  1_ tree in the world. People thought it was nearly  2    years old,    3   they could not be sure. Then someone cut the tree down    4   a chain saw. Killing the oldest tree in the world was a   5  thing to do. But  __6   the tree was cut down, everyone knew   7 _ age. It was 4,900 years old.

     How can you   8   the age of a tree? If you ever see a tree that has just been cut down,   9   a look at the cut part. You will see   10   . There are little rings in the middle. Around each ring is a  11   ring. The ring near the bark(树皮) is    12 _  one of all.

     Count these rings. A tree grows one ring  13   . A ten-year-old tree has ten rings. A   14   tree has sixty rings.   15  rings does a 4,900-year-old tree have?

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15. He read it to me _____ I could understand it.

  A. so as           B. so that           C. because          D. for

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14. It was hard to work _____ the Great Green Wall.

  A. in              B. at               C. up              D. on

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13. I will spend as much time as I can _____ speaking English.

  A. practicing       B. to practise        C. practise          D. practiced

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12. Man can’t live _____ air _____ water.

  A. with, and        B. with, or          C. without, and      D. without, or

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11. Why should trees _____ in spring every year?

  A. plant           B. be planted        C. are planted        D. to plant

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