题目内容：
回答题Transportation
Transportation is an essential part of urban design. There are a number of __41__ (benefit)forms of green transportation that support and enhance walkable urbanism. These green transportation options make our lives more __42__ (easy),reduce congestion, reduce our __43__ (depend) on cars and oil, are safer and less costly, help save the planet...and make life more fun!
The __44__ (green) and most sustainable forms of transportation are trains, bicycles, and __45__ (walk). Some of the world's best and fastest trains have been in __46__ (operate)for more than 25 years in Europe, and more than 40 years in Japan. These include futuristic high speed __47__ (train)like the Eurostar, the French TGV, the Japanese bullet train；and also __48__ (region)train ,monorails, light rail, trams, trolleys, streetcars, and so on. Clean __49__ (electricity) trains are a major form of daily transportation in numerous countries, and are the single most powerful transportation choice that can solve serious energy, environmental, economic, health, and social problems on a__50__ (globe) scale.
请在第__41__处填上正确答案。
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