单项选择题

Television--the most pervasive and persuasive of modern technologies, marked by rapid change and growth--is moving into a new era, an era of extraordinary (1) and versatility, which promises to reshape our lives and our world. It is an electronic revolution of sorts, made possible by the (2) of television and computer technologies.
The word "television", derived from its Greek (tele: distant) and Latin (vision: sight) roots, can (3) be interpreted as sight from distance. Very simply (4) , it works in this (5) : through a sophisticated system of electronics, television provides the capability of (6) an image (focused on a special photo-conductive plate within a camera) into electronic impulses, which can be sent through a wire of cable. These impulses, when fed into a (7) (television set), can then be electronically (8) into that same image.
Television is (9) just an electronic system, (10) . It is a means of expression, as well as a (11) for communication, and as such becomes a powerful tool for reaching other human beings.
The field of television can be divided into two (12) determined by its means of transmission. First, there is broadcast television, which reaches the masses through broad-based airwave transmission of television (13) . Second, there is non-broadcast television, which provides for the needs of individuals or (14) interest groups through controlled transmission techniques.
Traditionally, television has been a (15) of the masses. We are most familiar with broadcast television (16) it has been with us for about thirty-seven years in a form similar to what exists today. During those years, it has been controlled, for the most part, by the broadcast networks. ABC, NBC and CBS, who have been the (17) purveyors of news, information, and entertainment. These giants of (18) have actually shaped not only television but our perception of it as well. We have come to (19) the picture tube as a source of entertainment, placing our role in this (20) medium as the passive viewer.

Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C, and D on ANSWER SHEET 1.20（）

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