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Over the past decade, many companies had perfected the art of creating automatic behaviors-habits-among consumers. These habits have helped companies earn billions of dollars when customers eat snacks or wipe counters almost without thinking, often in response to a carefully designed set of daily cues 

There are fundamental public health problems, like dirty hands instead of a soap habit, that remain killers only because we can't figure out how to change people's habits, said Dr. Curtis, the director of the Hygiene Center at the London School of Hygiene Tropical Medicine. " We wanted to learn from private industry how to create new behaviors that happen automatically 

The companies that Dr. Curtis turned to Procter Gamble, Colgate-Palmolive and Unilever had invested hundreds of millions of dollars finding the subtle cues in consumers'lives that corporations could use to introduce new routines 

If you look hard enough, you' ll find that many of the products we use every day-chewing gums, skin moisturizers, disinfecting wipes, air fresheners, water purifiers, health snacks, teeth whiteners, fabric softeners, vitamins are results of manufactured habits. A century ago, few people regularly brushed their teeth multiple times a day. Today, because of shrewd advertising and public health campaigns, many Americans habitually give their pearly whites a cavity-preventing scrub twice a day often with Colgate, Crest or one of the other brands 

A few decades ago, many people didn't drink water outside of a meal. Then beverage companies started bottling the production of far-off springs, and now office workers unthinkingly sip bottled water all day long. Chewing gum, once bought primarily by adolescent boys, is now featured in commercials as a breath freshener and teeth cleanser for use after a meal. Skin moisturizers are advertised as part of morning beauty rituals, slipped in between hair brushing and putting on makeup 

Our products succeed when they become part of daily or weekly patterns said Carol Berning, a consumer psychologist who recently retired from Procter Gamble, the company that sold $ 76 billion of Tide, Crest and other products last year. Creating positive habits is a huge part of improving our consumers'lives and it's essential to making new products commercially viable.

Through experiments and observation, social scientists like Dr. Berning have learned that there is power in tying certain behaviors to habitual cues through ruthless advertising. As this new science of habit has emerged, controversies have erupted when the tactics have been used to sell questionable beauty creams or unhealthy foods 

31. According to Dr. Curtis, habits like hand washing with soap 

A. should be further cultivated 

B. should be changed gradually 

C. are deeply rooted in history 

D. are basically private concerns 

32. Bottled water, chewing gum and skin moisturizers are mentioned in Paragraph 5 

so as to 

A. reveal their impact on people's habits 

B. show the urgent need of dailly necessities 

C. indicate their effect on people's buying power 

D. manifest the significant role of good habits 

33. Which of the following does noT belong to products that help create people's habits?

A. Tide 

B. Crest 

C. Colgate.

D. Unilever 

34. From the text we know that some of consumers' habits are developed due to 

A. perfected art of products 

B. automatic behavior creation 

C. commercial promotions 

D. scientific experiments 

35. The author's attitude toward the influence of advertisement on people's habits is

A. indifferent 

B. negative 

C. positive 

D. biased