Read the text below, and decide which vowel sound the green vowels stand for.
Television
The first commercial television broadcast was made on April 20, 1939 by Radio Corporation of America (RCA). Since 1939, it has become one of the most important facts of modern life. Television is very much a part of the modern world. Its effects are felt all over the world.
Television is a reflection of the modern world, say some people. It shows contemporary society. It affects customs and culture, others say. Television is bad for culture because it keeps culture from growing, say still others.
Good or bad, television is difficult to avoid. Its pictures enter homes, stores, airports, and factories. It is here to stay!