Identify an error in each sentence.

It (A) took eight years to complete (B) the Erie Canal, the 365-mile (C) waterway which it connects (D) Albany and Buffalo in New York State.

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Study has shown that nature improves human health and well-being, ______ ?

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Van Cliburn who studied (A) piano from (B) 1951 to 1954 and won (C) multiple awards between (D) 1958 and 1990.

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Copenhagen has been voted the most ______ city in the world several times.

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New York has invested substantially in improving the ______ of its waterways in recent years.

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China has already been experimenting with ways to make its cities more ______ for the last two decades.

Read the passage below and choose one correct answer for each question.

Today’s urban cities are practically bursting at the seams. According to research from the United Nations, 54 percent of the world’s population lives in urban areas, a percentage that is expected to increase to over 66 percent by 2050. In fact, India alone is projected to add 404 million urban dwellers to its population by 2050. This rapid growth of the urban population has caused daunting problems for city planners, such as overcrowded roads, excessive energy consumption and unemployment. Therefore, to build more sustainable cities and accommodate the growing number of residents, many city leaders are turning to the Internet of Things (loT). The IoT has forever changed the way urban cities operate. Cities that were once detached and inaccessible are now intelligent and highly connected. From Amsterdam to Seoul, cities are launching smart city projects to help improve quality of life for residents and better support the environment. According to research from HIS Technology, there will be at least 88 smart cities globally by 2025, up from 21 in 2013. San Francisco, for example, provides more than 100 charging stations in various locations to promote the use of hybrid and electric cars to reduce harmful greenhouse gas emissions. Copenhagen is also taking advantage of the IoT to improve environmental protection and reduce road traffic by developing smart bikes equipped with sensors that generate data on air contamination and traffic congestion. The possibilities afforded by the IoT are endless; however, designing smart cities requires comprehensive technology infrastructure that is capable of capturing and processing large amounts of data quickly and securely - which is where 4GLTE comes into play. The future looks bright for urban cities. Soon they will be able to do things that only sci-fi enthusiasts could dream of before, like monitoring bridge conditions using intelligent sensors and conserving energy by automatically dimming street lights when no one is around.

Today’s urban cities__________.

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Vancouver is often considered to be one of the most ______ cities in the world.

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Since 2007, Boston police have been using Shotspotter, a system that allows them to _____ the location of shots fired immediately.

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As we move toward 2050, we are facing the consequences of _____ urbanization and population growth.

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Nothing serious will be expected in the process of building our smart city, ______ ?

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By 2050, seven out of every 10 people on Earth will be a(n) ______ .

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Telecommunications and cloud computing will ______ transportation for moving ideas and intellectual property.

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I think the cities of tomorrow also need to consider the availability of open space, _______ ?

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_______ structure in Ha Noi will be change with the development of satellite areas.

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Across the globe, nations are preparing for water scarcity, ______?