2. 外语
  3. Methods of training animals have changed greatly in recent years. Zoo keepers have always had problems getting the animals to le

Methods of training animals have changed greatly in recent years. Zoo keepers have always had problems getting the animals to le

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问题     Methods of training animals have changed greatly in recent years. Zoo keepers have always had problems getting the animals to leave their cages in order for the cages to be cleaned, and also training them to move indoors when appropriate. Another problem was that many of the large animals became listless and bored. In the last twenty years, scientists have done research on dolphins and whales, training them to obey commands. The scientists found they could get animals to obey by rewarding them with food and affection when they responded correctly.
    Proper training allows the animals to receive the care they need. It was very difficult to get untrained animals, especially the larger ones, to stay still when they needed medical attention. Now they can be trained, on command, to remain still and even to allow blood samples to be taken and shots administered. All this is accomplished through positive reinforcement, without the use of any force. Affection training, as this process is called, has been used with great success on a wide variety of zoo animals. Animal behavior experts have taught zoo keepers to train bears, tigers, monkeys, and many other species to behave in a way that provides for better animal-keeper interaction. This training also keeps the animals from becoming bored and inactive.
From the first paragraph, we know that many animals ______.
选项 A、are safe to pet
B、respond favorably to rewards and affection
C、can be trained in the wild
D、should not be kept in zoos
答案B
解析 文章第一段最后一句说，科学家发现当动物做得对时，人们奖赏它们食物和关爱，动物是会听人们的话的。可见，选项B最符文章内容，为正确。A、C、D在文中未涉及到。
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