What is your favorite color? Do you like yellow, orange, and red? If you do, you must be an optimist, an active person who enjoys life, people and【C1】______ .Do you prefer grays and blues? Then you're probably quiet,【C2】______ , and you would rather follow than【C3】______ You tend to be a 【C4】______ . At least, this is what psychologists tell us, and they should know because they have been【C5】______ studying the meaning of color【C6】______ as well as the effect that colors have【C7】______ human beings. They tell us,【C8】______ other facts that we do not【C9】______ our favorite color as we grow up since we are born with our preference. If you happen to love brown, you did so, as soon as you opened your eyes, or【C10】______ as soon as you could see clearly. Colors do【C11】______ our mood. There is【C12】______ doubt about it. A yellow room makes most people feel more cheerful and more relaxed than a dark green one and a red dress brings【C13】______ and cheer to the saddest winter day.【C14】______ , black is depressing. A black bridge over the Thames River, near London,【C15】______ to be the scene of more suicide than any other bridge in the area【C16】______ it was painted green. The number of suicide attempts immediately fell sharply【C17】______ it would have fallen even more if the bridge had been done in pink or baby blue. Light and bright colors make people not only happier but more energetic. It is a(n)【C18】______ fact that factory, workers work better, harder and have fewer【C19】______ when their machines are painted orange【C20】______ black or gray. 【C1】