B. The BBC is against the “stand right, walk left” etiquette.

　　C. People should be patient and take the stairs if possible.

　　D. People shouldn’t complain about the crowded escalators.

　　27. Which of the following statements is the writer’s opinion?

　　A. People should stand right no matter where they are.

　　B. People should do as the Romans do and consider others.

　　C. People should do as they like on the escalators.

　　D. People should be seriously criticized when they block the way.

　　13.A glass a day keeps obesity at bay．Alcohol has always been thought to cause weight gain because of its high sugar content，but new research suggests a glass a day could form part of a diet．Looking at past studies they found that，while heavy drinkers do put on weight，those who drink in moderation can actually lose weight．

　　A spokesman for the research team at Navarro University in Spain says，“Light to moderate alcohol intake，especially of wine，may be more likely to protect against，rather than promote，weight gain．”The International Scientific Forum on Alcohol Research reviewed the findings and agreed with most of the conclusions，particularly that current data do not clearly indicate if moderate drinking increases weight．

　　Boston University’s Dr．Harvey Finkel found that the biologic mechanisms(生物学机制)relating alcohol to changes in body weight are not properly understood．His team pointed out the strong protective effects of moderate drinking on the risk of getting conditions like diabetes(糖尿病)，which relate to increasing obesity．Some studies suggest that even very obese people may be at lower risk of diabetes if they are moderate drinkers．

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