2016年6月英语四级阅读答案：试卷二仔细阅读（沪江网校版）
51. A to see whether people's personality affects their life span.52. D They are more likely to get over hardship.
53. C Such personality characteristics as self-discipline have no effect on longevity.
54. D Mother's negative personality characteristics may affect their children's life spans.
55. B Longevity results from a combination of mental and physical health.
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