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六级练习2013.09.16


       
       





Why do we cry? Can you imagine life without tears? Not only do tears keep your eyes lubricated, they also contain a substance that kills certain bacteria so they can’t infect your eyes. Give up your tears, and (1)_________________________.
Nobody wants to give up the flood of extra tears you produce when you get something physical or chemical in your eyes. Tears are very good at (2)______________________.
Another thing you couldn’t do without your tears is cry from joy, anger or sadness. Humans are the only animals that (3)____________________, and most people say a good cry makes them feel better. Many scientists, therefore, believe that crying somehow helps us cope with emotional situations.





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produce tears in response to emotions

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too difficult

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you'll lose this **spot defence
washing irritating stuff out
produce tears in response to emotions

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HAO DIFANG

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