题目内容：

短文填空.

We know that trees are useful in our everyday life. They ________ us many things, such as wood, rubber(橡胶), medicine and many other things. They can ________ tell us a lot about our climate. The following are the reasons(理由). If you ________  across a tree, you can see that it has many rings. Most trees grow one new ring ________ year. Because of the reason, we know ________ a tree is. A tree over a hundred years old means that it has more than a hundred   ________ . When the climate is not much rainy or very cold, the trees do not grow very much and their rings are usually   ________  . When it is wet and warm, the rings are not thin. If the rings are suddenly very thin or suddenly very thick(厚), this means that the ________ changes suddenly. If we look at the rings on this tree, we can learn   ________  the climate for a hundred years. We can see________ our climate changed. From trees we can get a lot. So we should pay attention to them as much as possible.

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

2.A. not       B. too     C. to         D. also

3.A. cut       B. climb    C. walk       D. see

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. long    C. small      D. thin

8.A. climate  B. trees   C. rings      D. animals

9.A. from      B. of     C. about      D. to

10.A. how     B. why      C. when      D. while