阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
According to a recent survey, violence did exist in schools. Students showed their fear and parents and teachers also expressed their great concern about it. Experts hope the whole     (social) pay more attention to the mental health of adolescents.
Nowadays, school violence is a hot issue. I think this is a phenomenon,       calls for our great concern. We should try every effort      (prevent) violence happening at school for more and more students would drop out of school       their personal safety could not be guaranteed. In fact, violence can      (learn). Children learn violent behavior from adults or from      they see on television or on       Internet.
If I meet with school violence, I will not answer violence       violence, for it will result in      (much) fighting. I will tell my teachers or parents about it. I think they will help me deal with it well and they will protect me from the bad guys. All in all, every student should behave       (he) and keep away from violence.