Identify an error in each sentence.

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

Choose the best answer to complete each sentence.

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

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

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We will need new technologies to generate energy and use it in clean and safe ways, only from fully ______ sources.

Choose the best answer to complete each sentence.

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

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

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

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