根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

　　There are many factors which may have an influence on adults and children being able to lead a healthy life.

　　41

　　Often, both parents work outside the home. Children are expected to take on more responsibility at home to help their parents. They also have sporting and leisure activities as well as school expectations.

　　The business also adds another factor: The need to use cars to get from one place to another quickly.

　　42

　　Computers, DVDs, CDs, television,PlayStations and Xboxes have become major leisure activities, rather than traditional more active pursuits. This has led to a lifestyle of less exercise.

　　43

　　Unfortunately, they also promote fast food which fits easily into busy lifestyles. It is much more convenient at times to buy a quick take away rather than prepare a meal. The media constantly bombard (轰炸) their audience with “perfect” body images, the need to buy the most fashionable clothes, the most up-to-date computer games, the best places to visit and the best things to do.

　　Environments vary.

　　44

　　This can be harmful to people who suffer from breathing difficulties. Environments where passive smoking is unavoidable make it difficult to lead a healthy life.

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