根据短文内容, 从短文后的A~F选项中, 选出5个适当的选项补全短文。 "What! You, too? I believed I was the only one." Have you ever said something like this to someone? _____71_____
It seems that similarity often helps form friendship. The Greek thinker Aristotle once said, "People regard friendship as a matter of similarity; they say that we love those who are like our-selves." ____72____ Scientists from University of California said friends have similar behaviors, Scientific American reported.
The scientists invited 42 university students to take part in a test. Each student watched the same set of videos, which included a comedy, a discussion and a soccer match. _____73_____According to their scans, friends who watched the same video reacted in similar ways. Similar parts of their brains lit up while watching the videos, especially parts that are connected with motivation(动机), learning and memory. ____74____
"Seeing one's friends have similar behaviors will reinforce(强化)one's own values, opinions, and interests," lead scientist Carolyn Parkinson told Business Insider. ___75___ Scientists from the University of Leipzig, Germany, found that friendship is also based on how physically close you are to someone. The scientists did a test with first-year college students the first time they met in class. In this test, students who sat in neighboring seats were more likely to become friends.
A. Now, there is some science behind this idea.
B. If so, you may have ended up becoming friends with this person.
C. Friends share a lot of similarities, though there are some differences.
D. But brain similarity is not the only thing that can result in friendship.
E. However, people who weren't friends had different reactions to the same videos.
F. At the same time, scientists scanned their brains and recorded their brain activity.
【文章大意】本文主要叙述大脑相似性可能会产生友谊，但这并不是友谊产生的唯一因素。
71.B【解析】句意：如果是这样的话，你可能最终和这个人成为了朋友。
分析上下文可知，前文提及可能与别人有相同的想法，后文说到相似之处似乎有助于建立友谊。所以此处内容与友谊和相似性相关。结合选项，故选B。
72.B【解析】句意：现在，这个想法背后有一些科学依据。
根据后句“Scientists from University of California said friends have similar behaviors, Scientific American reported.”可知，据《科学美国人》报道，加州大学的科学家称，朋友之间也有类似的行为。后文提及科学依据，所以此处与科学研究相关。结合选项，故选A。
73.F【解析】句意：与此同时，科学家扫描了他们的大脑并记录了他们的大脑活动。
根据后句“According to their scans, friends who watched the same video reacted in similar ways.”可知，根据扫描结果，看了同一段视频的朋友的反应是相似的。此处内容应与扫描相关。结合选项，故选F。
74.E【解析】句意：然而，那些不是朋友的人对同样的视频有不同的反应。
分析上下文可知，上文做了扫描的研究，指出看了同一段视频的朋友的反应是相似的，研究结果呈现的应该不止一种结果，结合选项，“那些不是朋友的人对同样的视频有不同的反应”符合，故选E。
75.D【解析】句意：但是大脑的相似性并不是导致友谊的唯一因素。
根据后文内容“Scientists from the University of Leipzig, Germany, found that friendship is also based on how physically close you are to someone.”可知，德国莱比锡大学的科学家发现，友谊还取决于你和某人的身体距离，所以前文叙述的大脑的相似性并不是导致友谊的唯一因素，还有其他因素存在。结合选项，故选D。