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

　　A. a, c, e B. b, d, f

　　C. c, d, f D. d, e, f

解析：选B　推理判断题。根据文章第一段中的"how important they are to general health and happiness"，第二段中的"doing housework is helpful because of the exercise it takes to get the daily job done"以及最后一段中的"people living in a dirty environment seemed less satisfied than those in a place that was neat and tidy"可知，做家务可以使我们的房间干净整洁、使我们多运动、促进我们的身心健康