Online social networks are massively influential, yet we understand very lit

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问题 Online social networks are massively influential, yet we understand very little about the impact they have on our brains. Recently, scientists have found a direct【C1】______ between the number of Facebook friends a person has and the size of【C2】______ brain regions. The study also shows the more Facebook friends a person has, the more real-world friends he is【C3】______to have.
Facebook users who have a【C4】______ of friends also tend to have smaller circles of friends in the real-world and,【C5】______ those who have thousands of friends on Facebook are likely to have larger circles offline, according to the study. The findings support the【C6】______ that most Facebook users use the site to【C7】______ their existing, real-life social relationships, maintaining or reinforcing these friendships,【C8】______creating a network of entirely new,【C9】______friends.
The researchers scanned the brains of 125 university-aged Facebook users,【C10】______these scans to the size of their friend networks online and the real-world. Those with larger Facebook networks had larger amounts of grey matter in several regions of the brain. One of these regions, the amygdala, is【C11】______with processing memory and emotional responses. Pairing this【C12】______ another recent study, the researchers show increased volume grey matter in the amygdala【C13】______a larger network of real-world friends.【C14】______ these studies show a large network of online friends also point to an increased volume of grey matter—【C15】______ information processing occurs. In addition to brain scans, the participants were asked questions【C16】______to compare the size of their online networks to the size of their real-world networks.
The study【C17】______ the correlation between the number of friends online【C18】______ offline. Still, it is not possible from the【C19】______to say whether having more Facebook friends makes the regions of the brain larger【C20】______ whether some people are " hardwired" to have more friends. [br] 【C16】

选项 A、posed
B、remained
C、designed
D、selected

答案 C

解析过去分词辨析题。句意为：除了进行脑部扫描之外，实验参与者还要回答专门设计的问题。用以比较其网上好友和现实朋友圈的大小。这里用过去分词，其后说明这问题的目的。因此该词应表示“设计”等意义，故选择designed。posed“提出”带有造成困难、麻烦之意，与原文不符；文中没有提及有更多提前准备好的问题，因此remained“保留”和selected“选择”没有依据。

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Online social networks are massively influential, yet we understand very lit

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