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问题详情

This passage mainly tells the reader how ___.( )

A、the London Underground works

B、a passenger travels on a subway train

C、a passenger buys a subway ticket

D、the London Underground

时间：2021-09-02 00:20 关键词：青书学堂西安石油大学石油工程技术大学英语l(下）

答案解析

B

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