31. Thewords“physicalneedsofthecity”referinparttothe water used for(A)drinking. (B)bathing.(C)cleaning streets. (D)cooking.

38. Which of the following statements is true about the FDA?(A)They recommended that everyone eat two 85-g servings of fatty fish a week.(B)They believed that omega-3 could reduce the risk of coronary disease.(C)They allowed the manufactures of omega-3pillstoadvertisethefat’sbenefits.(D)They suggested taking more than two grams of omega-3 per day.