假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文，文中共有10处错误，每句中最多有两处。每处错误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：把多余的词用斜线（\）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。
Last week, our class held a class meeting to celebrate World Animal Day. At first, we made preparations to the activity. Several students design a blackboard poster but some decorated the classroom. The meeting began with few interesting games. Then, a sad song about animals sang by two girls touched us deep. Four other students performed a play, showing us how terrible the situation of endangered animals were. Finally, our monitor gave us a speech, that made us aware of the importance of protecting animal.
The activity is meaningful because of we now realize that human beings should live in harmony with animals.