3.That the author mentions the old Romans is

　　A.To compare the old Romans with today’s people.

　　B.to give an example.

　　C.to show human beings in the past know nothing better.

　　D.to indicate human beings are used to bloodthirsty.

　　4.How many dangerous sports does the author mention in this passage?

　　A.Three.

　　B.Five.

　　C.Six.

　　D.Seven.

　　5.The purpose of the author in writing this passage is

　　A.that, by banning the violent sports, we human beings can improve our selves.

　　B.that, by banning the dangerous sports, we can improve the law.

　　C.that we must take positive steps to improve social welfare system.

　　D.to show law is the main instrument of social change.