题目内容：

    Squirrels aren’t natural city dwellers(居民). In 1986 the sight of one in a tree near New York’s city hall so surprised passers-by that a newspaper published a report about the “unusual visitor”.

Around that time, the tree-dwelling animals were being set free in America’s urban areas to “create pockets of peace and calm like the countryside,” says University of Pennsylvania historian Etienne Benson, who studied our relationship to squirrels over the course of five years.

First, they were introduced to Philadelphia, then to New Haven, Boston, and New York City. Park visitors were encouraged to feed them, and security guards ensured their safety. In the 1910s a leader of the Boy Scouts of America(an organization teaching boys practical skills)said that teaching children to feed squirrels could show the rewards of treating a weaker creature with sympathy, says Benson.

By the early 20th century, though, America began to regret the friendliness it had shown squirrels. Cities had once been filled with animals—from horses pulling goods to dairy cows. By the 1950s those working animals had been moved to the countryside. Pets and wild animals such as birds and squirrels were all that remained of the urban animal kingdom.

Before long, people’s enthusiasm for squirrels wore off, and they started to see them as annoyances. By the 1970s many parks banned feeding the creatures. Today, it is rare to find kids with their parents offering food to squirrels under a tree. And, unfortunately, with more and more buildings being constructed in the city, fewer inhabitable(适宜栖息的)areas are left for the little tree-dwelling animals.

What would be lost if the last of these city dwellers were forced to leave? “I think there’s something constructive to have other living creatures in the city that are not humans and not pets but share the land with us,” says Benson. “It’s a good thing to live in a landscape where you see other creatures going around making lunch. It’s good for the soul.”

1.What’s the purpose of introducing squirrels to Philadelphia?

A. To entertain park visitors. B. To keep the natural balance.

C. To encourage kids to protect animals. D. To make the urban life more peaceful.

2.What was the Boy Scouts leader’s attitude towards feeding squirrels?

A. Disagreeable. B. Doubtful. C. Supportive. D. Uncaring.

3.What might have happened to squirrels in cities around the 1960s?

A. They might have inhabited more homes.

B. They might have begun to go out of favor.

C. They might have been introduced to more cities.

D. They might have been moved to the countryside.

4.What does Benson suggest in the last paragraph?

A. Squirrels living in cities are annoying.

B. Feeding squirrels should be discouraged.

C. Squirrels should be allowed to live in cities.

D. It is possible for people to keep squirrels as pets.