D．stable

　　解析：每个人在世界上都有自己独特的(unique)位置。也可以从下文的You are special推知该空答案。

　　答案：A

　　Ⅴ.阅读理解

　　It is pretty much a one­way street. While it may be common for university researchers to try their luck in the commercial world, there is very little traffic in the opposite direction. Pay has always been the biggest deterrent,_as people with families often feel they cannot afford the drop in salary when moving to a university job. For some industrial scientists, however, the attractions of academia(学术界) outweigh any financial considerations.

　　Helen Lee took a 70% cut in salary when she moved from a senior post in Abbott Laboratories to a medical department at the University of Cambridge. Her main reason for returning to academia mid­career was to take advantage of the greater freedom to choose research questions. Some areas of inquiry have few prospects of a commercial return, and Lee's is one of them.

　　The impact of a salary cut is probably less severe for a scientist in the early stages of a career. Guy Grant, now a

　　research associate

　　at

　　the

　　Unilever

　　Centre

　　for Molecular Informatics at the University of Cambridge, spent two years working for a pharmaceutical (制药的)

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