Different things usually stand for different feelings. Red, for example, is the color of fire, heat, blood and life. People say red is an exciting and active color. They associate（使發生聯系） red with a strong feeling like   46 . Red is used for signs of   47 , such as STOP signs and fire engines. Orange is the bright, warm color of   48  in autumn. People say orange is a   49  color. They associate orange with happiness. Yellow is the color of __50__. People say it is a cheerful color. They associate yellow too, with happiness. Green is the cool color of grass in __51__. People say it is a refreshing color. In general, people __52__ two groups of colors: warm colors and cool colors. The warm colors are red, orange and __53__. Where there are warm color and a lot of light, people usually want to be __54__. Those who like to be with __55 _ like red. The cool colors are __56_  and blue. Where are these colors, people are usually worried. Some scientists say that time seems to __57 _ more slowly in a room with warm colors. They suggest that a warm color is a good __58_  for a living room or a __59_ . People who are having a rest or are eating do not want time to pass quickly. __60  colors are better for some offices if the people working there want time to pass quickly.