【题目】Cars are too expensive for many people around the world to own. Not only that, many cities are already full of traffic, and many country areas have rough roads. So __【1】__ do people travel those distances that are too far to walk? They use public transportation. If you ride the subway or bus __【2】__ you live, you can appreciate some of the benefits of public transportation. With many people __【3】__ (share) one bus or train, there is less traffic and, more __【4】_ (importance), less pollution. Which of the types of mass transit __【5】_ (describe) below are you familiar with?    If a regular bus can hold dozens of people, imagine what a bus __【6】__ (two) the size can hold! In Great Britain, there are many buses that are known as doubledeckers (cars with two floors). Buses in Haiti are often very crowded. It's not __【7】__ (common) for passengers to actually sit on the rooftops. Buses are sometimes called “tap­taps”, because the _【8】__ (ride) on the roof tap(敲击) when they want to be dropped off. Many large cities around the world take advantage of the space beneath the streets and run underground trains. People in Paris, Mexico City and  Tokyo may use the subway system to get to school, to work, or to visit friends in other __【9】__ (neighbor). Both the Japanese and French have developed High speed trains to link various cities. The French TGV (high speed train ) is the world's fastest, __【10】__ (average) over 270 kph!

【语篇导读】本文为说明文，主要介绍了几种交通工具。