Choose wisely when considering a partner, whether to attend church and how you look after your body. These decisions could have a (47) effect on your overall life satisfaction. That’s according to a study that (48) the theory that life happiness is largely predetermined by your genes. The widely accepted "set-point" theory of happiness says that an individual’s long-term happiness tends to be stable because it depends (49) on genetic factors. The idea is based in (50) on studies that show identical twins to have more similar levels of life satisfaction than non-identical twins, and suggests that although your level of happiness may (51) be thrown off by major life events, it will always (52) to a set level within two years. Bruce Headey at the University of Melbourne in Australia and his team found that certain changes in lifestyle led to significant long-term changes in reported life satisfaction, rather than causing the (53) deflections(偏差) in happiness that set-point theory would suggest. One of the biggest influences on a person’s happiness was their partner’s level of neuroticism (神经病). Those with partners who scored highly on tests for neuroticism were more likely to be unhappy—and to stay unhappy for as long as the (54) lasted. Altruism (利他主义) and family values also influenced long-term happiness. People whose annual survey responses changed to place a higher (55) on altruistic behaviors and family goals were rewarded with a long-term increase in life satisfaction. Those who prioritized career and material success, however, (56) a corresponding lasting decline. A. challenges B. creates C. experienced D. exclusively E. mainly F. negotiated G. occasionally H) optimism I)part J) priority K) relationship L) return M) significant N) temporary O) tolerant