In addition, more solutions include expanding cities outwards to allow more people to live in urban areas. London authorities, for instance, are pushing the boundaries of their boroughs outwards to cater for expected population surges; the city is anticipated to cater for 10 million residents by 2030.

　　One way to foresee the impacts of these kinds of plans — both on the land and on people living there — is to test them first in a virtual reality setting. Dassault Systèmes has developed technology that can predict how a city will grow and develop, while optimising natural resources and sustainable urban living. The technology has already been used to help architects and planners foresee the full impact of new building projects on the city and inhabitants in Shenzhen, China — a city which has sprung into a bursting metropolis of 10 million in the last 30 years.

　　As more people race to cities, it might be reassuring to think that the same technologies that are making this possible are also putting the planet and its population at the heart of the outcome.

　　1. The world’s cities are facing a problem that ________.

　　A. more people will move to suburban areas

　　B. the shortage of labor will become serious

　　C. a great number of people will flood into cities

　　D. urban population will be on the decrease

　　2. The purpose of London authorities expanding their boroughs is ________.

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