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3. What do the scientist find in their research? 科学家们在他们的研究中发现了______________。

A. Female elephants live longer than male elephants.雌象比雄象活得更长。

B. Female zoo elephants live longer than their wild counterparts.动物园雌象比野生的活得更长。

C. Female zoo elephants die much earlier than their wild counterparts. 动物园雌象比起它们的野生的同伴来说要死得早。(正确答案)

D. Elephants in zoos and those in the wild enjoy the same long life spans.动物园大象和野生大象有一样的寿命。

4. What are the possible causes of stress and obesity Zoo-raised elephants generally suffer from? 动物园中饲养的大象遭受压力

和肥胖的可能的原因是______________。

A. They do not like living in herds.它们不喜欢在畜群中生活。

B. They do not get enough exercise.它们没有得到充分的锻炼。

C. They do not live with their families.它们没有和它们的家人一起生活。

D. Both B and C. B 和C都对。(正确答案)

5. Which of the following does the author suggest in the last paragraph? 在最后一段，作者暗示了______________。

A. It may not be a wise policy to keep elephants in the zoo. 把动物养在动物园里是不明智的做法。(正确答案)

B. Elephants are no longer an endangered species.大象不再是濒临灭绝的物种。

C. Zoo-born elephants should be looked after more carefully.照顾动物园里出生的大象应该更仔细。

D. Zoos should keep more animals except elephants.除了大象，动物园里应该饲养其他更多的动物。

6. Do scientists know why wild elephants seem to fare so much better than their zoo-raised counterparts.? 科学家是否清楚野生

大象比动物园大象更好的原因?

A.uncertain不确定(正确答案)

B.positive 明确的、肯定的

C.clear清楚的

D.biased片面的