文中共有10处错误，每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（^），并在其下面写出该加的词。
删除：把多余的词用斜钱（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改均仅限一词；2．只允许修改10处，多者（从第11处起）不计分。
It’s been a long time since I do something good for the environment. Feel responsible to protect the environment, I decided to take action again. I told my idea with my friends and we planned to plant the trees on the hill in the rural area of the city.
We came to the foot of the hill and selected a place where looked suitable and settled down. We spend a few hours digging holes and placing the young seedlings (幼苗). Then we wrote our wishes on cards one to one and buried it deep down the roots of the trees. We also took numerous pictures. We were such busy that we didn’t realize it was time to go back. I felt really glad that we made difference to the environment.