8. She is more and more        (beautiful) .

7. What        ( environment) problems are there in our city?

6. I'm        ( concern) that the dirty air might make some young children ill.

   5. Parents should keep their children  from      ( play) with fire.

4. In different ways,we can make a        ( differently) .

   3. We need to take proper        (act) to protect the environment.

   2. Cutting down trees        (cause) the surface of the soil to be easily destroyed.

II.用所给词的适当形式填空

   1. As a result of the greenhouse effect,the temperature is        (increase ) .

   12.  What is the        (目的) of your visit?

   11.  We should try to        (回收利用) all our waste paper.