课本资源改编为阅读理解题TaxisTaxis are in the streets 24 hours a day. Simply raise your hand, and a taxi will appear in no time. They are usually red, and they display the price per kilometre on the window. You should check whether the cab has a business permit, and make sure you ask for a receiptBuses and trolleybusesPublic transport provides a cheap way to get around in Beijing. There are 20,000 buses and trolleybuses in Beijing, but they can get very crowded. Its a good idea to avoid public transport during the rush hour(630 a.m.800 a.m. and 500 p.m.630 p.m.). Fares are cheap, starting at 1yuan. Air-conditioned buses cost more. Buses numbered 1 to 100 are limited to travel within the city centre. Higher numbers have destinations in the suburbs. Tourists shouldnt miss the 103 bus which offers one of the most impressive routes, past the Forbidden City and the White Pagoda in Beihai Park. If you get on a double-decker bus, make sure you sit upstairs. Youll have a good view of the rapidly changing cityMost buses run from about 500 a.m. to midnightHowever, there is also a night bus service, provided by buses with a number in the 200sMinibusesMinibuses with seats for 12 passengers offer an alternative to expensive taxis and crowded public transport in some areasThey run regular services and follow the same routes as large public busesAnd in a minibus you always get a seat even in rush hoursUndergroundThere are four underground lines in Beijing, and several lines are under constructionTrains are fast and convenient, but rush hours can be terribleA one-way trip costs 3yuanStation names are marked in pinyinThe underground is open from 500 a.m. to 1100 p.m.PedicabsTourists like these human-pedalled “tricycle taxis”, but they can be expensiveYou should talk to the driver, and make sure you know the price before you begin the journeyFor example, if it is per person, single or returnTricycles are worth using if you want to explore the narrow alleys(hutong)of old Beijing20. What color are most taxis?A. Usually green. B. Usually red. C. Usually blue. D. Usually yellow.22. Whats the problem with buses?A. Buses are always late. B. Buses usually break down on the way.C. Buses can get crowded. D. Buses can be dangerous.23. What is the advantage of the underground according to the passage?A. The price is unreasonable. B. It travels too fast.C. It can be terrible during the rush hour. D. It is less convenient than the pedicab.