【正确答案】 B

【答案解析】[听力原文]
   All parents know it is difficult to get children to eat their vegetables. Some of them offer rewards or treats for children finishing their share. But researchers have discovered that youngsters who are not praised for trying vegetables are more likely to eat them eventually. The study found that the best way to get children to eat food they do not like is simply to give them repeated exposure to it.
   Psychologists from Ghent University in Belgium studied 98 children. They gave them five kinds of vegetables to eat: mushrooms, peas, eggplants, carrots and cabbages. The taste tests revealed that carrots were the least-liked vegetable among youngsters. The children were then given a bowl of boiled carrots and told to choose how much to eat. After eight minutes, they were asked to rate the dish as "delicious", "just OK" or "disgusting". The trial went on twice a week for a month, with a follow-up taste test after eight weeks.
   Children were split into three groups, with one group asked to try the bowl of carrots repeatedly with no further encouragement. The other two groups were given rewards of a toy or verbal praise. After the trial, 81 percent of children who simply tried the carrots consistently liked them. This is in contrast to 68 percent for the group given a toy and 75 percent for the group given verbal praise.
   What is the best way to get children to eat vegetables according to a recent study?
本题问根据最近的一项研究，让孩子吃蔬菜的最好方法是什么。录音中提到，让孩子吃不爱吃的食物的最好方法是让他们不断接触到这些食物(give them repeated exposure to it)，B“让他们不断接触到蔬菜”与此相符，expose sb. to sth. 意为“使某人接触到某事物”o
   A“他们吃蔬菜，就奖励他们”在录音一开头有提到(offer rewards or treats for children finishing their share)，但在But转折后就作了否定，说不奖励反而会吃得更多。C“改善蔬菜的味道”和D“向他们解释吃蔬菜的好处”都没有在录音中提到。