答案　B．Pessimism may be positive in some way because it causes people________.

　　A．to fully enjoy their present life

　　B．to estimate their contribution accurately

　　C．to take measures against potential risks

　　D．to value health more highly than wealth

　　解析　细节理解题。由第六、七段中的关键信息“...people who were pessimistic about their future may be more careful about their actions...”及“...contribute to taking improved precautions(预防措施)．..”可知对未来持悲观态度的人会对他们的行动更加小心并且采取一些预防措施，故选C项。

　　答案　C．How do people of higher income see their future?

　　A．They will earn less money.

　　B．They will become pessimistic.

　　C．They will suffer mental illness.

　　D．They will have less time to enjoy life.

　　解析　细节理解题。由第八段第一句话“Surprisingly, compared with those in poor health or who had low incomes, respondents who enjoyed good health or income were associated with expecting a greater decline.”可知工资高的人会预料他们未来工资的下降，故选A项。

　　答案　A．What is the clear conclusion of the study?

　　A．Pessimism guarantees chances of survival.

　　B．Good financial condition leads to good health.

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