单项选择题

It is plain common sense—the more happiness you feel, the less unhappiness you experience. (62) , recent research reveals that happiness and unhappiness are not really flip sides of the same emotion. They are two (63) coexisting feelings that rise and fall (64) . The recognition that happiness and unhappiness can coexist much (65) love and hate in a close relationship may offer valuable (66) on how to lead a happier life. It suggests, for example, (67) changing or avoiding things that make you miserable (68) well make you less miserable but probably won’t make you any happier. That advice is (69) up by an extraordinary series of studies which (70) that a genetic predisposition for unhappiness may run in certain families. (71) , researchers have found,happiness doesn’t appear to be anyone’s heritage. The (72) for joy is a talent that you develop (73) for yourself. Family members (74) each other more in their levels of unhappiness than in their levels of happiness. And identical twins, a/ere much closer than (75) twins in unhappiness,a finding that implies a genetic (76) . Why is unhappiness less influenced by environment When we’re happy we tend to be more (77) to people and to keep (78) connections better than when we’re feeling sad. This doesn’t mean, however, some people are born to be sad. Genes may predispose (预先安排)one to unhappiness, but disposition can be influenced by personal (79) . You can increase your happiness through your own actions, regardless of your heritage. Psychologists have discovered some of the actions and attitudes that seem to bring people closer to that most desired of feelings. To begin to think about happiness may help us to understand not only what we have but possibly what we don’t have. By (80) happiness we may be able to see more clearly what we really want,and we may also be able to ask ourselves (81) what we want is worth getting.