A．professional people should pick out proper information from the Internet for school
B．professional people should instruct teachers and students to use the Interne
C．educators should be active in using compute
D．educators should have their own email addres

A．communitie 
B．government
C．school 
D．researching group

A．The on-line information for school teachin
B．Some problems of the Internet us
C．Who is responsible for the Internet safet
D．How to evaluate the on-line resource