I know sense of responsibility and carefulness is significant建议改成I know the importance of responsibility and carefulness
they must take on responsibilities and be careful建议删掉,因为前面已经提到过了,单词重复显得累赘
I am looking forward CGA建议改为I am dreaming of CGA
文章总体来说写的不错,做些小小改动就可以了~