Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks

All early television was broadcast in black and white. Color television was possible but it was too (21) _____ and of very poor quality until the middle of the 1950s. Color television broadcasts began in the United States in 1954, in Japan in 1960, and in Europe in 1967.

The first (22) _____ on the moon was broadcast live on television in 1969, and now television programs are transmitted all over the world immediately through the use of satellites that transmit the signals from the earth, through (23) _____, and back to the earth.

More people now (24) _____ their news and information through television than through newspapers and radio. The development of television is one of the most rapid and exciting (25) _____ of our century.