46. B【解析】細(xì)節(jié)理解題。根據(jù)第一段句子＂Bike-sharing has swept across China, with an increasing number of people choosing bike riding instead of driving.＂共享單車席卷中國，越來越多的人選擇騎自行車而不是開車�？芍�第一段告訴我們共享單車正變得越來越流行。故選B。

　　47. B【解析】細(xì)節(jié)理解題。根據(jù)文中句子＂It’s very convenient to use the bikes if you have a smart phone. First, you have to download such an APP on your smart phone.＂（如果你有智能手機(jī)，使用自行車非常方便。首先，你必須在智能手機(jī)上下載這樣的應(yīng)用程序。）可知，如果你想使用共享單車，你必須先有一個(gè)智能手機(jī)并下載一個(gè)應(yīng)用程序。答案為B。

　　48. C【解析】詞義猜測題。上文提到有些人把自行車停在自己家里。結(jié)合下文中的句子＂Now service companies are trying to solve the problem like being stolen.＂（現(xiàn)在服務(wù)公司正試圖解決這個(gè)問題，比如被盜。）可以猜測value的意思是＂愛惜＂，有些人不愛惜自行車。答案為C。

　　49. A【解析】細(xì)節(jié)理解題。根據(jù)文中句子＂The bike that the service company provides has GPS or Bluetooth on it. And those bikes can be easily unlocked with a smart phone and left anywhere in public.＂可知，共享單車很容易解鎖；根據(jù)＂Now service companies are trying to solve the problem like being stolen.＂可知，共享自行車可能會(huì)被盜；根據(jù)＂The cost of riding depends on the time that you spend. Normally, every hour you ride, you need to pay one yuan. It doesn’t cost so much, does it?＂可知，使用共享單車比較便宜；A. Bike-sharing is a kind of expensive transport. 自行車共享是一種昂貴的交通工具。文章沒有提及，故答案為A。

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