Watch out for dangers at school

Watch out for dangers at school
School is where we learn,make friends and grow up.But accidents happen daily in schools across the world.We hear reports of students falling from the building while cleaning the windows.Other students were hit by footballs at the playground.On December 7,2009,a had accident _________（happen）at a middle school in the of Xiangxiang,Hunan province.Some students fell down on the stairs and were stepped on by others,with sad results.What should we do to be safe at school?The students should _________（teach）safety tips at school in order to protect themselves and others when accidents happen.The following are about the dangers at school and safety tips for you.
How to prevent a stampede
◆After class or school,don’t rush out at the time._________（wait）until there are fewer people trying to leave.
◆When you walk with a crowd of people,stay alert and watch your steps.
◆When there _________（push）and squeezing,stand still and try to hold on to something.Or staying a corner until the crowed _________（leave）.
◆Learn to one side,curl up your body and bend your legs _________（protect）your organs.
62.___________________ 63.___________________ 64.___________________
65.___________________ 66.___________________ 67.___________________

62.happened
63.be taught
64.Wait
65.is pushing
66.leave
67.to protect
你那文章中怎么那么多错误啊,是抄错了,还是原文有问题?