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							What  can you do for the earth? 
							This worksheet is intended to let studnets know how important our world is and think about how we can reduce the pollution in order to protect the planet. Students not only can learn the auxiliary verbs "must", "should" "can", but also can realize how vital the planet is. 
							
							
							
							 Level:elementary 
    
     Age: 8-17
    
      Downloads:4 | 
    
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							Copyright 28/3/2009  Lewis 
							Publication or redistribution of any part of this 
							document is forbidden without authorization of the 
							copyright owner. 
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