选择题：Beijing.s Roads for the Future　　The road system in

Beijing.s Roads for the Future
　　The road system in Beijing.s central business district (CBD) is being re-designed to make public transportation easy and improve efficiency.
　　Plans for 45 roads within the CBD have been approved, measuring 41.5 kilometers in total. In addition to public buses, free or low price shuttle buses from residence areas to subway stations will also be provided for commuters.
　　This is just over four times the number of roads opened in 2007, and will add another 15.5 km to the existing road network.
　　Besides roads, an underground traffic system has also been operating, which includes four new subway lines beneath the CBD.
　　The underground connection system is made up of two levels. The first underground floor is set aside mainly for pedestrians and commercial facilities, while the second underground floor is planned for parking.
　　The city has also invested 140 million yuan to set up a traffic inquiry system, through which the public can check traffic conditions online and see the most convenient routes on their GPS system. In the future, the CBD will be fully covered by an intelligent traffic control system.
　
操作提示：通过题干后的下拉框选择题目的正确答案。
1. The road system in Beijing.s downtown area is being to make public transportation easy and improve efficiency.
回答

　A. built
　B. designed again
　C. constructed
2. An underground system including new s