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Shanghai is a beautiful metropolitan city with tall buildings lining the clean streets.It is a city full of life and bustling with activity.To keep the city in such an excellent state,we should strive to do our part to protect the environment.For instance,some of the things that we should do are to plant more trees and flowers and refrain from littering.This is all done in preparation for the World Expo to be held in Shanghai in 2010.
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