Zoos divide opinion ： there are those who think it is cruel to keep animals locked up while others believe zoos are essential for the survival of endangered species.
To argue that zoos imprison animals is to misunderstand what zoos are about. Without zoos many of the creatures we love and admire would no longer exist. Every single day，over one hundred animal species vanish. Scientists predict that as early as 2050 one quarter of the Earth’s species will become extinct.
Some animals are in danger because they are hunted. Alarmingly, the population of tigers has already fallen by ninety-five percent. Other species are in danger because of a lack of food. For example, there are fewer than 1300 giant pandas left in the wild.
Zoos have special breeding programmes to help those animals at risk. These breeding programmes are proving extremely successful. As Irene Shapiro from Zoo and Wildlife Support says, “the Puerto Rican Parrot has grown in numbers from just thirteen to about eighty-five and the Golden Lion Tamarin Monkey, which has almost ceased to exist twenty years ago, has been reintroduced back into the wild. ”
Unfortunately, not everyone understands this important role zoos play. For example, Brian Featherstone from the Anti-Zoo Forum says, “I can’t believe we take animals from the wild and put them in cages for the entertainment of the public! We should view them on film or TV in their natural environment.，’
However, this misses the point. A zoo does more than display animals to the public. It ensures their survival. Without zoos you would not be able to see many of these animals on TV or anywhere else!
What’s the writer’s attitude towards zoos?

A．He shows no opinion either for or against them.

B．He thinks that they are unnecessary and cruel.

C．He believes they play an important environmental role.

D．He expresses a desire that more of them be built.

The underlined word “vanish” in Paragraph 2 most probably means _____.

A．remain

B．disappear

C．become rarer

D．get killed

According to the passage the world’s tiger population _____.

A．will rise by 5% next year	B．is relatively stable
C．is 95% smaller than in the past	D．has fallen to 95%

According to the passage some people do not agree with zoos because they _____

A．are too expensive to run	B．put animals in danger
C．do not provide enough food	D．keep animals locked up

According to the writer ，the most important function of the zoo is to _____.

A．make a lot of money	B．entertain visitors
C．ensure animals’ survival	D．educate the public