A number of Americans are moving into cities. When they move into cities, they drive less. New York City is one of the top cities for new people and for users of mass transit. New York's mass transit system operates 24-hours-a-day, 7-days-a-week. The public transport system costs $1.5 billion a year to maintain. It is one of the world's oldest mass transit systems. The city's first subway line opened in 1904.

Use of public transportation is the highest in almost every American city. Researchers say Americans took 10.7 billion trips on public transportation in 2012. Many people believe public transit is less costly than car use and is good for the environment. 

New York City is planning several major expansions of its public transportation system. One project is a new $4.7 billion subway line. The first part of the project is going to be completed in 2016. People who work in New York's financial area will soon be using a new subway center. Almost all of New York City's subways meet in the lower part of Manhattan. The new center will give riders an easier way to travel to the neighboring state of New Jersey. The most costly planned project is a $7 billion tunnel connection from Long Island into Manhattan's Grand Central Terminal.

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1.Many Americans move into cities, they ________.

A use public transportation less

B drive less

C ride bikes less

D walk less

解析：选B。B 细节理解题。依据第一段的“When they move into cities, they drive less.”可知当这些人搬到城市时，他们很少开车。故选B。

2.It takes New York ________ to maintain the public transportation system a year.

A 7 billion $

B 4.7 billion $

C 10.7 billion $

D 1.5 billion $

解析：选D。D 细节理解题。依据第一段的“The public transport system costs $1.5 billion a year to maintain.”可知纽约每年在维护公共交通方面的费用一年1.5 billion 美元，故选D。

3.In almost every American city _______ is the highest.

A use of cars

B use of public transportation

C new public transportation system cost

D use of new subway

解析：选B。B 细节理解题。依据第二段的“ Use of public transportation is the highest in almost every American city.”可知在美国的每一个城市，公共交通的客流量最高。故选B。

4.In New York, the new subway center will help people _______.

A travel around the whole city more easily

B cut down the cost of public transportation

C travel to the world famous places more easily

D travel to the state of New Jersey more easily

解析：选D。D细节理解题。依据第三段的“The new center will give riders an easier way to travel to the neighboring state of New Jersey.”可知新的地铁中心将使得乘客通向New Jersey 的各州更为容易，故选D。

5.The passage mainly talks about _______.

A some states of America

B public transportation of America

C buses of America

D how to live on Long Island

解析：选B。B 主旨大意题。通读全文不难看出本文主要讲了美国的公共交通的一些情况，故选B。

6.What is the main idea of the passage?

A Burmese pythons are really devastating invaders.

B Burmese pythons are able to find their way home.

C Burmese pythons have colonized most of Florida.

D Burmese pythons are famous for their big sizes.

解析：选B。主旨大意题。根据本文的主题句Scientists studying the invasive giant Burmese pythons（蟒蛇） that invaded Florida have discovered the snakes can find their way home even when taken up to 20 miles away可知本文主要讲缅甸蟒蛇具有非同寻常的导航本领，能找到回家的路。故B项最佳。

7.What do you know about Burmese pythons?

A They are the world's largest snakes.

B They are easy to find in the grass.

C They are native to Southeast Asia.

D They entered south Florida in the late 1990s.

解析：选A。细节理解题。根据第三段第三句The snakes immediately headed back, taking "direct and striking" routes, instead of moving randomly across the wetlands可知这些放生的缅甸蟒蛇是走捷径返家的。

8.What do you know about Burmese pythons?

A They are the world's largest snakes.

B They are easy to find in the grass.

C They are native to Southeast Asia.

D They entered south Florida in the late 1990s.

解析：选D。细节理解题。根据第五段第三句the snakes began to appear in south Florida in the late 1990s 可知缅甸蟒蛇是在20世纪90年代末才侵入佛罗里达南部的。根据Burmese pythons are one of the world's largest snakes可知A项错误。根据They are hard to spot in the grass even when tracked with transmitters可知B项错误。根据Native to southern Asia可知C项错误。

9.We can infer that ______.

A more than 2,000 Burmese pythons live in south Florida

B many Americans raise Burmese pythons as their pets

C the python population in Florida needs to be controlled

D Burmese pythons can help us to protect other animals

解析：选C。推理判断题。根据最后两段While more than 2,000 Burmese pythons have been removed from the area since 2002, the National Park Service estimates that represents only a small part of the total population/The snakes are devastating invaders等信息我们可以得出结论：缅甸蟒蛇现在在佛罗里达泛滥成灾，破坏生态，到了该抑制缅甸蟒蛇数量的时候了。