Safety in school
What happened？	Two students ran after each other in the classroom.One fell down and hurt his（1）          arm，and he had to stay in hospital for （2）           days.
What should we do？	Students should always （3）            but not run in the classroom.
	The teachers had better keep a/an （4）          on the students after class and stop them from running.
	Schools should make（5）          to protect students from the accident.