Great changes have taken place in Shanghai and more and more people throughout the world are focusing their attention on Shanghai now. As a citizen of Shanghai，I feel I must spare no efforts to do my bit. First，I decide to help plant more trees to make our city more beautiful. Second, I should obey seven no's and be good at learning from others. Third，I should study hard so that I can do something better for my city in the future.
注释:
1) take place发生
2) focus one's attention on…二把注意力集中在……
3) spare no efforts不遗余力
4) to do my bit尽我的微薄之力
4) make our city more beautiful使我们的城市更美丽
5) obey seven no's遵守七不规范