短文改错
In the past two years, our school had organized many activities. What impressed me most was an activity calling “Learning to Farm”. On a autumn afternoon, we went to a farm, which we learned to plant potatoes. Having in the city for such a long time, we were so happily to go to the countryside. After we got there, we were divided into three groups, but we started to work. Some students cut potato plants (马铃薯秧)into pieces, some dug hole, and the others put the pieces of potato plants into the holes, put the soil back and pushed them down hard. We were all busy working until all the work was done. Though we were tired out, we felt pleased on our way back to home.