根据短文内容和首字母提示，把所缺单词填写在短文中的横线上

       Many students often c  l  about school. They might feel they have too m  2   work to do sometimes,

or think the rules are too s  3  . We must learn how to change these " problems " into " challenges " .  

Education is an important part of our d   4   . As young teenagers, it is  our d  5   to try our best to deal

with each challenge in our education with the h  6   of our teachers.