life,"Katti says."That's not much of surprise. But they don't actually dominate as much as we think they do."Those species-occurring in the cities across the globe-represent only a small part of a city's natural varieties.

　Not all cities are equal protectors of native animals and plants, though. One of the biggest predictors for a city's biodiversity is its urban design. Territory as varied as backyards and street trees can lay important roles in greening a city. In fact, the amouht of green space is a stronger predictor of the density of biodiversity than a city's size. A metropolis with a sizable network of parks can contain more species per square mile than a much smaller city.

　In a world where architecture, food, language, fashion and commerce are increasingly globalized, a city's native animals and plants can be a kind of identity. There may be neighborhoods in London and Paris that resemble Singapore or Hong Kong. Cities are becoming similar, but their natural environments stand completely apart.

56. According to the passage, what do you think of Phnom Penh, Cambodia's capital?

A. It is full of various rare plants and animals.

B. Its birds' population is larger than that of San Francisco.

C. It's as big as Philadelphia in terms of area.

D. It is on an equal footing with Beijing and Milan.

57. Which of the following statements is NOT the same as the author's idea?

A. From a biological point new changes happen every day.

B. From an environmental point the daily changes aren't obvious enough.

C. Each city has different characteristics in terms of ecological development.

D. Different species of creatures are born in different cities.

58. Some plants are found in many cities in the world, which seems to be a result of ____.

A. natural selection B. globalization

C. urban development D. colonization

59. Which of the following might be the best title of the passage?

A. What Surprising Cities! The Medium-sized City Has Various Species of Birds!

B. The Power of Plants and Animals! The Charm of All the Cities!

C. The Cities Are Concrete Jungles! Never Think about Them the Same Way Again!

D. More Species Per Square Mile! The Amount of Green Space Is a Stronger Predictor!

（B）

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