PleasefilltheblanksofthefollowingsentencefromWilliamArthurWard.Themediocreteacher（）.Thegoodteacher（）.Thesuperiorteacher（）.Thegreatteacher（）.

A.explains,tells,inspires,demonstrates

B.tells,explains,demonstrates,inspires

C.tells,demonstrates,explains,inspires

D.explains,demonstrates,tells,inspires

正确答案：B