How long does it take to fly to Shanghai?乘飞机到上海需要多长时间?Nowadays, how long does it take to tear down a building?现在拆毁一栋建筑物需要多久的时间呢?How long does it take for an airmail to get...解答第一句具体哪里不懂，翻译很清楚，这是都是问句怎么回答？不是翻译。How long does it take to fly to Shanghai?乘飞机到上海需要多长时间？Two hours.这个只要根据问题，回答时间就可以了