题目内容：
阅读短文，回答题。Three Kinds of Loneliness
1 Most people feel lonely sometimes, but it usually only lasts between a few minute sand a few hours. This kind of loneliness is not serious. In fact, it is quite normal. For some people, though, loneliness can last for years. Now researchers say there are three different types of loneliness.
2 The first kind of loneliness is temporary (暂时的）? This is the most common typEIt usually disappears quickly and does not require any special attention. The second kind, situational loneliness, is a natural result of a particular situation—for example, family problem, the death of a loved one, or moving to a new placeAlthough this kind of loneliness can cause physical problems, such as headaches and sleeplessness, it usually does not last for more than a year.
3 The third kind of loneliness is the most severeUnlike the second type, chronic (长期的）loneliness usually lasts more than two years and has no specific causePeople who experience habitual loneliness have problems socializing and becoming close to others. Unfortunately, many chronically lonely people think there is little or nothing they can do to improve their condition.
4 Psychologists agree that one important factor in loneliness is a person's social contacts, Eg. friends, family members, co-workers, etc．We depend on various people for different reasons. For instance, our families give us emotional support, our parents and teachers give us guidance, and our friends share similar interests and activities. However, psychologists have found that, though lonely people may have many social contacts, they sometimes feel they should have moreThey question their popularity.
5 Psychologists are trying to find ways to help habitually lonely people for two reasons. First of all, they are unhappy and unable to socialize with others like normal peopleBesides, most importantly, there is a connection between chronic loneliness and serious ill-ness such as heart diseaseWhile temporary and situational loneliness can be normal, healthy part of life, chronic loneliness can be a sad, and sometimes dangerous condition.
Paragraph 2____ A．Two kinds of loneliness
B．Two reasons for assisting people with chronic loneliness
C．Temporary loneliness
D．Psychologists' agreement
E．Habitual loneliness
F．One reason for loneliness—socialization
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