完形填空。 Scientists are trying to make the dert into good land again. They

题文

完形填空。     Scientists are trying to make the dert into good land again. They want to bring    1     to the dert,  so people can live and grow food.  They are    2    a lot about the dert. But    3    of the earth is becoming dert all the time, scientists may not be able to    4    . the derts. Scientists think that people make derts.  People are doing    5    things to the earth.       Some places on the earth don't get    6   .  But they still don't become derts. This is _7  _ some green plants are growing there.  Small green plants and grass are very    8    to dry places. Plants don't let the wind blow the earth away. When   9  _ bit of rain falls,  the plants hold the water.   10   plants,  the land can become a dert much more easily.(     )1. A. food             (     )2. A. learning         (     )3. A. fewer and fewer  (     )4. A. u              (     )5. A. good             (     )6. A. little rain      (     )7. A. becau          (     )8. A. careful          (     )9. A. a little         (     )10. A. With            B. water        B. writing      B. less and lessB. change       B. better       B. much warm    B. for          B. helpful      B. a few        B. Without      C. money          C. buying         C. more and more C. lo           C. bad            C. much rain      C. as             C. forgetful      C. a lot         C. For            

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答案

1-5 BACBC   6-10 CABAB

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