Manylargecitieshaveasubwaysystem（地铁系统）．ThesubwayiscalledtubeinLondon．InSanFrancisco，itiscalledBART（BayAreaRapidTransit）．Somesubwaysystems，likeChicago's，arequiteold．Itopenedin1897．Othersare

Question

Many large cities have a subway system（地铁系统）．The subway is called tube in London．In San Francisco，it is called BART （Bay Area Rapid Transit）．Some subway systems，like Chicago's，are quite old．It opened in 1897．Others are more recent．For example，Mexico City's subway started in 1969．
Most subways are very modern and clean，but sometimes they get very crowded．So people have to follow certain rules to make the trip more comfortable．In London，when people use the tube，they must stand on the right so that people in a hurry can walk on the left．They let passengers get off the train before others get on，and people are expected to give their seats to the old and disabled people．
Some subways provide excellent services．In most subways，there is a station about every one kilometer．Trains arrive at a station about every two minutes．Subways carry a lot of passengers．The number of people traveling one way each hour ill London can be about 30，000．In some other cities it is much higher．Hong Kong's subway holds the record of about 80，000passengers an hour!
29．"Tube"is the name of the underground trains in___．
A．Hong Kong      
B．Mexico City      
C．San Francisco      
D．London
30．How do people in London make their underground trip more comfortable？___
A．They stand on the left of the train to let others pass on the right．
B．They get off the train quickly after others get on．
C．They don't give seats to the old and the disabled．
D．They follow some rules in the subway．
31．Which of the following statements is NOT true according to the passage？___
A．Trains arrive at a station about every two minutes．
B．Most subways in the world are old but clean．
C．There is a station about every one kilometer in most subways．
D．Hong Kong subway can hold many passengers an hour．
32．The best title for the passage is___．
A．The history of subway system            
B．Subway systems in China
C．Subway systems around the world         
D．A story of Hong Kong subway．

Answer 1

29．D．细节理解题．根据The subway is called tube in London．可知地铁在伦敦被称为tube．故选D．
30．D．细节理解题．根据So people have to follow certain rules to make the trip more comfortable．可知人们必须遵循一定的规则以便使旅途更舒适．故选D．
31．B．推理判断题．根据Trains arrive at a station about every two minutes，可知火车大约每两分钟到达一个站点，所以选项A，Trains arrive at a station about every two minutes．描述正确；根据Most subways are very modern and clean，可知大多数地铁是非常现代和干净的，所以选项B，Most subways in the world are old but clean描述错误；根据In most subways，there is a station about every one kilometer，可知大多数的地铁，每一公里都有一个车站，所以选项C，There is a station about every one kilometer in most subways描述正确；根据Hong Kong's subway holds the record of about 80，000passengers an hour，可知香港的地铁保持的记录大约是一小时8万旅客，所以选项D，Hong Kong subway can hold many passengers an hour描述正确．故选B．
32．C．主旨大意题．根据Many large cities have a subway system以及下文描述，可知短文描述了世界的地铁系统．故选C．