It was sunny last Sunday. David went to the park with his brother. They got there at 8:00 by bus. There were lots of people doing morning exercises. Soon David found there were lots of empty bottles and paper bags in the park. David and his brother decided to clean the park. They picked them up and threw them into the dustbins(垃圾箱). They worked hard. About two hours later, the park was clean again.
At last they made a sign, saying “ No littering ” in the park. They wanted people to keep the park clean. After that, they went to restaurant nearby to have lunch. They had two large bowls of beef noodles there, and then went home. Though they were very tired, they felt very happy.