北师大初中英语八年级下册 Unit8 expansion-1（MP3+LRC）

[00:00.00]Unit 8 Transportation

[00:07.26]Expansion 8

[00:08.64]3 In many large cities

[00:12.48]there is a subway system of underground trains.

[00:17.73]Cities have different names for their subways.

[00:22.30]The London Underground is called The Tube.

[00:26.32]In San Francisco,it is called BART

[00:30.69](Bay Area Rapid Transit).

[00:34.20]Some subway systems,like Chicago's,

[00:37.44]for example,are quite old.

[00:40.86]It opened in 1897.

[00:44.92]Others are more recent.

[00:47.77]For example,Mexico City's subway

[00:51.21]started in 1969.

[00:55.17]In a subway,the train lines

[00:58.86]form a separate transportation system.

[01:02.36]They usually go through underground tunnels

[01:05.68]in the center of the city and above the ground

[01:09.54]on the edge.

[01:10.05]