Last Sundy I went to the park with my friend.It took us an hour to get there by bike.It was sunny and warm that day.There were lots of people in the park.We climbed the mountain and went boating.And we had a picnic in the park,too.When we finished the picnic,we picked up the rubbish and threw it into the dusbin.We thought it was our duty to make the environment clean.We had a good time that day.