请仔细阅读第56—60题中的个人情况说明，从A到F的六个选项中，选出符合各人要求的最佳选项，其中一项为多余选项。

小题1: The City Library is in the downtown. Li Fei is planning to write a report about the flood(洪水). He'd like to go to the City Library to look for some information. There is a small bus station near his home.

小题2: Wang Tao lives in Beijing. He will have three days off next week. He is interested in traveling. So he is going sightseeing in Shanghai. He'd like to get there as soon as possible. He is sure he will have fun in Shanghai.

小题3:in Ling likes taking photos, especially photos of rivers and mountains. She is excited that her parents will take her to the Three Gorges(三峡). She hopes she can take many photos when they are traveling on water.

小题4:This month Chen Xu will visit her grandparents in her hometown. It is about 1,000 kilometers away. Chen Xu hopes to get there in ten hours. And she will be able to enjoy the sights along the railway.

小题5:Zhang Kai is a volunteer in a green group. Tomorrow he is going to listen to a talk in the central park. The park is nearly four kilometers away from his home, and he has decided to choose a way that is good for the environment.

汉末至唐代，婚姻受门阀制度影响极大，讲究门当户对，士庶不婚；宋代时，婚姻“不问阀阅”，士庶婚姻成为风俗。这一婚姻观念的变化主要源于（）。

A.等级观念的淡化

B.人口大量迁徙流动

C.理学思想的影响

D.社会阶层流动频繁