The guy who advised me not to solely rely on such channels as CNN, BBC, etc. for improving the required skills for international tests of English proficiency is Mr. Terry Peck, author of the great '101 Helpful Hints for
IELTS'. But that is
IELTS, a test that is required of students who want to study oversees in the UK, Australia, etc., just as TOELF is for those seeking admission to the US or Canada colleges.
Thanks a lot for your reply.