We have saved as a final set of emotions the two most important emotions pertaining to other people: love and its opposite, hate. Love can be seen everywhere. Yet surprisingly, love has been the subject of less scientific research than other emotions, such as anger and fear. The reason for this may be twofold. First, love is a very complex emotion, difficult to describe and measure. Secondly, unlike many extreme emotions, extreme love is generally not a problem; thus less medical attention has been paid to it. What is love? This is a complex question and requires a complex answer. Love is an enduring, strong, positive attraction and feeling for another person or thing. But it is more than this. It also involves feelings of caring, protection, excitement, and tenderness. When two people are in love, they feel drawn to one another; they greatly enjoy each other's company; and they may be sexually attracted to one another. Sometimes it is easier to think in term of different kinds of love: “puppy” love, romantic love, brotherly love, and so forth. Though they differ in some respects, they share one important characteristic: a strong positive feeling toward another. Our feeling toward other people are often complex. We may love someone and, at the same time, be angry with him. Or we may love someone, even though we are jealous of him. We might even love someone and, at the same time, hate him for some specific reason. Hate is a strong negative emotion toward someone, and is due to anger, jealousy, or some other factor. Like love, hate can be a very strong emotion. It can also be very dangerous. The question is often asked, “Is it bad to hate?” The best answer is probably “sometimes yes and sometimes no.” Usually hate does not help us; it makes us feel unhappy and makes us do things that may hurt others. However, sometimes it may be necessary to hate and hurt someone in order to protect loved ones. 1. In the parts previous to the passage you've just read, the author has probably been discussing A. the two most important human emotions—love and hate B. some emotions that are only produced by animals C. some other sots of human emotions than of love and hate D. none of the above 2. According to the passage, the emotion of love has been medically paid less attention to because——. A. it is too common to be talked about B. compared with other kinds of emotions, love is not so important C. the study of love needs great effort and advanced scientific research D. love is harmless and too complex for description 3. When two people are in love, they A. will never be angry with or hate each other B. are strongly attracted to each other C. will not be jealous of each other D. tend to do all of the above 4. Which of the following might best be used as the tide for the passage? A. Two Most Important Emotions towards Others B. Love More and Hate Less C. The Great Benefits of Love and the Serious Harm of Hate D. Some Advice to Those Who Are In love