[单项选择]Elephants live in families of ______.


A. males and females
B. males
C. females

[单项选择]Elephants live in families of ______.


A. males and females
B. males
C. females

[单项选择]How long can elephants live


A. They can live for twenty years.
B. They can live for fifty years.
C. They can live for eighty years.

[单项选择]______ elephants are different from wild elephants in many aspects, including their tempers.
A. Cultivated
B. Regulated
C. Civil
D. Tame

[单项选择]To which two great families or groups of families does the passage refer


A. the Yorkists and the Lancastrians
B. the Yorks and the Roses
C. the White and the Red
D. France and England

[单项选择]

Most people think of zoos as safe places for animals, where struggles such as difficulty finding food and avoiding predators don’t exist. Without such problems, animals in zoos should live to a ripe old age.
But matter may not be true for the largest land animals on Earth. Scientists have known that elephants in zoos often suffer from poor health. They develop diseases, joint problems and behavior changes. Sometimes, they even become infertile or unable to have babies.
To learn more about how captivity affects elephants, a team of international scientists compared the life spans of female elephants born in zoos with female elephants living outdoors in their native lands. Zoos keep detailed records of all the animals in their care, documenting factors such as birth dates, illnesses, weight and death. These records made it possible for the researchers to analyze 40 years of
A. have difficulty eating food
B. live to a ripe old age
C. are not afraid of predator
D. develop health problems

[单项选择]How do some countries protect elephants from being hunted
A. By persuading ivory hunters.
B. By trying to take more care of elephants.
C. By establishing elephant preserves.
D. By fighting with ivory hunters.

[单项选择]In what ways are elephants like the human beings


A. They never forget great sadness or great happiness.
B. They live in families of females.
C. They live together for a long time.
D. They have daughters, mothers and grandmothers.

[单项选择]Female elephants in India and southern Asia have ______
A. large and heavy tusks
B. small and short tusks or not any teeth at all
C. small and short tusks
D. long and light tusks

[单项选择]What can we know about the elephants in zoos


A. They generally breed well.
B. They may not suffer health problems.
C. They may die relatively young.
D. They are cleverer than the wild elephants.