51. According to the author American television is poor in quality because _________.
[ A ] advertisers are interested in experimenting with new ideas
[ B] it is still at an early stage of development, compared with the radio
[ C ] the programs have to be developed in the interests of the sponsors for economic reasons
[ D] it is controlled by radio companies
52. The second paragraph is mainly about_________.
[ A ] TV as the sustainer of American life
[ B ] TV as the major transmitter of culture
[ C ] the educational effect of TV on society
[ D ] the strong influence and the poor quality of American TV
53. In the author' s view American TV should _________.
[A] be critical but entertaining
[ B] be creative and educational
[ C ] change with the development of society
[ D ] attract as many viewers as possible
54. The author believes that television in the United States has become important to most people because _________.
[A] it promotes family unity
[ B] it helps them develop their speaking ability
[ C] it attracts their life in many ways
[ D] it challenges society
55. The author ' s attitude towards American television is _________.
[ A ] critical [ B ] praising
[ C ] doubtful [ D ] sympathetic