题目内容：

阅读下面材料，在空白处填入适当的内容或括号内单词的正确形式。

It is widely accepted that optimistic attitudes promote health as well as happiness. The secret of a long life is 1. (universe) desired and has long been sought. Today we can reveal it: always look on the bright side. A huge research project2.(lead) by scientists at the Boston University School of Medicine concludes that optimists live3. (long).

Lewina Lee, lead author of the study, said, “A lot of evidence4.(suggest) that exceptional longevity( 长 寿 ) is widely accompanied by a longer span of good health and living5. disability. Therefore our findings raise an exciting possibility6. we may be able to promote health and  happiness by7.(develop) positive attitudes such as optimism.”

However, the study doesn’t suggest that we should aim for great pleasure. Sadness is8. important part of the human condition. Any normal person sometimes experience disappointment, ambitions and the9.(lose) of loved ones. But for many people, these matters of human existence 10. (transform) into an abnormal state of despair. There is a vital place in public health for providing mental treatment in helping to correct these cognitive errors. It is not weakness to be defeated by setbacks. It is merely a mistake.