2. Which of the following does the dolphin use to help it find its way around?_______.
A. Its nose. B. Its ears.
C. Its mouth. D. Its eyes.
答案：C 指导，海豚是靠声音探路的，而接听声音的地方却不是耳朵而是嘴的下部。
3. Why did the sailors off the coast of New Zealand look for Jack?
A. He was lonely and liked to be with people.
B. They enjoyed playing with him.
C. He was seriously wounded.
D. They wanted his help.
答案：D 指导：由于这片水城十分凶险，所以水手们需要杰克的帮助。
4. By telling the story of Jack the writer wanted to show that_______.
A. dolphins are friendly and clever
B. people are cruel to animals
C. Jack is different from other dolphins
D. dolphins should be protected'by law
答案：A 指导：文章大部分篇幅都在讲述海豚与其他动物的不同，它们与人类的友谊的故事，说明了海豚是一种友好而又聪明的动物，所以A为最佳选项。
