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九、81. One possible version:An unforgettable dayEveryone has an unforgettable day in their livesOn 15th August last year, I cleaned up a parkwith my five friends. At 8: 00 am. we left forPeople s Park by bus. It took us an hour to get thereThere was a lot of rubbish in the park. We spentabout 4 hours collecting all of it. We felt tired andhungry but very happy, because the park becamecleaner and more beautiful. When we finished it wasalready one o clock. We had a big lunch in arestaurant. We ate and talked about our clean-up. Weall thought it was meaningful.I was proud of myself that day and I will alwayemember it