Dr. Wright said she was surprised to learn that doing housework and keeping their property affected the participants' mental and physical health more than other factors. "House cleaning kept them up and moving，" said Dr. Wright. "A clean environment is helpful in treating some illnesses. And poverty (贫穷) did not directly affect mental or physical health."

　　The study proved what Dr. Wright had observed in her visits: people living in a dirty environment seemed less satisfied than those in a place that was neat and tidy. Dr. Wright hopes the study shows how important it is for older people with chronic illnesses to continue physical activities, such as doing reaching exercises while sitting, standing up and sitting down in a chair.

　　1．What can we infer from the first paragraph?

　　A．Most people don't like doing housework.

　　B．Most people are too busy to do housework.

　　C．Most people do less housework than before.

　　D．Most people don't know how to keep healthy and happy.

　　解析：选A　细节理解题。根据文章第一段的第一句"There are usually few things people want to do less than housework."以及之后的"... seem like troublesome things" 可推知，大多数人都不喜欢做家务。

　　2．When Dr. Wright and the team did the research, they .

　　A．limited the participants' moving areas to certain places

　　B．tried different treatments for the participants' illnesses

　　C．observed the changes of the participants' behaviors

　　D．chose those who were weak as their participants

　　解析：选D　细节理解题。根据文章第三段最后一句"The study's 337 participants, from 65 to 94 years old, had to have at least one chronic (慢性的) illness ..."可知，他们选择一些年老体弱的老人作为研究对象。

　　3．According to the passage, by doing housework, we can .

　　a．learn to share

　　b．do some exercise

　　c．learn to be responsible

　　d．keep the house clean and tidy

　　e．enjoy staying with family members

f．improve our mental and physical health