It is a sunny day today.We went to the park by bike happily.As we got there,we found the ground was so dirty.So we cleaned the rubbish and set up a notice with "PROTECT OUR ENVIRONMENT" on it to remend others of environment protection.We pioneered "protecting the environment is everyone's duty" together.The workers of the park are very thankful for our help.At last,we left happily because we have done a good deed!
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