28. What does the author mean by "the long-term effects of war" (Line 1, Para. 3)?

47. What did the Common Sense Media survey reveal?

46. What do we learn from the study by the Josephson Institute of Ethics?

55. What message does the author try to convey at the end of the passage?

54.How can scientists help cope with poverty and hunger?

53.What will happen when food aid is offered at a price?

52.What do we leamn about the WFP＇s effort to eliminate hunger?

51.What does the WFP＇s winning of the Nobel Peace Prize make us realize?

50. What does the author imply by saying aquaculture is no silver bullet?

49. Why does the author say aquaculture is so important these days?

48. What does the author say about China in terms of aquatic food?