Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks from 21 to 30 . INFLUENCES OF TELEVISION Television has changed the lifestyle of people in every industrialized country in the world. In theUnited States, where sociologists have studied the effects, some interesting observations have been made. Television, although not essential, has become a(n) (21) _______ part of most people’s lives. It has become a baby-sitter, an initiator of conversations, a major transmitter of culture, and a keeper of traditions. Yet when what can be seen on TV in one day is critically analyzed, it becomes evident that television is not a teacher but a sustainer. The poor (22) _______ of programs does not elevate people into greater (23) _______ . The (24) _______ reason for the lack of quality in American television is related to both the history of TV development and the economics of TV. Television inAmericabegan with the radio. Radio companies and their sponsors first experimented with television. Therefore, the close relationship, (25) _______ the advertisers had with radio programs, became the system for American TV. Sponsors not only paid money for time within programs, but many actually produced the programs. Thus, (26) _______ from the capitalistic, profit-oriented sector of American society, television is primarily (27) _______ with reflecting and attracting society (28) _______ than innovating and experimenting with new ideas. Advertisers want to attract the largest viewing audience possible; to do so requires that the programs be entertaining rather than challenging. Television inAmericatoday remains, to a large (29) _______, with the same organization and standards as it had thirty years ago. The hope for some evolution and true achievement toward improving society will require a change in the (30) _______ system. Trả lời câu hỏi dưới đây:_______(21)