To find out _______ young people think about the future of urban life, a teacher in the US. asked his students to think ______ they would run a city of 50,000 people in 2025A.what; howB.how; whatC.what; whatD.how; how
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A解析考查名词性从句。What引导宾语从句，在从句中作宾语，how引导宾语从句，在从句中作状语，故选A。