Newspapers, magazines, and books are the written media. Newspapers are one of the main sources for spreading news and events (25)______ the world. Radio and television supply information and entertainment to the public. Motion pictures are one of the most (26)______ forms of entertainment. Movies can also teach people many other subjects. The multimedia computer helps students learn about a particular topic in a (27)______ of ways. When we use the Internet, we can give and get a lot of information very (28)______. 15. A. all B. throughout C. out D. on 16. A. right B. interested C. expensive D. popular 17. A. variety B. difference C. change D. kind 18. A. exactly B. correctly C. secretly D. quickly