根据所给中英文提示,写一篇短文

It was sunny yesterday, all the students of class 3 came to plant trees in the park. They walked to the park for about half an hour, and got there at eight in the morning.
All of them worked hard and helped each other, after finished planting trees, they started to come back at four in the afternoon.
Though all of them were tired, they still feeled very happy.= =中文翻译也来一个吧~~~昨天天气晴朗，三班的全体同学都去了公园植树。他们花了半小时走到公园，到了公园已经是上午8点。他们都非常卖力，互相帮助，植树结束后，他们开始在下午4点钟往回走。尽管所有人都很累，但大家仍然感到很快乐。你是英语老师？不是，但是工作中每天都用英语。。。