结构推理 为什么人们要在旅行上花费这么多的时间和金钱呢?(Why is it that...)
【正确答案】Why is it that people spend so much time and money on traveling?
【答案解析】[翻译指导] why is it that可看成是一个强调句型，强调why；spend...on sth.“在…上花费”。