题目内容:
Dr. Brosnan and Dr. de Waal have eventually found in their study that the monkeys ________.
prefer grapes to cucumbers
can be taught to exchange things
will not be cooperative if feeling cheated
are unhappy when separated from others
参考答案:
Dr. Brosnan and Dr. de Waal have eventually found in their study that the monkeys ________.
prefer grapes to cucumbers
can be taught to exchange things
will not be cooperative if feeling cheated
are unhappy when separated from others