语法总觉得有错误可是word检查不出来.求指导.

语法总觉得有错误可是word检查不出来.求指导.
We senior 3 students are supposed to participate in growing-up ceremony ingymnasium at Chinese youth day,4th may 2013.We are responsible forourselves because we have grown up and not a child any longer.Meanwhile,feeling thankful for our parent since they bought us up exhaustedly.What’smore,as a member of society,we ought to be responsible for it.With themeaningful ceremony,we realize that the responsibility we taken will beheavier than ever before,making decision thoroughly also.“We are responsible forourselves because we have grown up and not a child any longer.”and后面不是应该接句子吗not不清楚是什么类的词如果动词不是应该跟前面一样写现在完成时吗.这是高考15分满分的作文大概能拿多少分.