Extreme Programming (XP) is a discipline of software development with 1of simplicity, communication, feedback and courage. Successful software development is a teameffort - not just the development team, but the larger team consisting of customer,management and developers. XP is a simple process that brings these people together andhelps them to succeed together. XP is aimed primarily at object-oriented projects using teamsof a dozen or fewer programmers in one location. The principles of XP apply to any _2_ project that needs to deliver quality software rapidly and flexibly. An XP project needs a(an) 3_ customer to provide guidance. Customers, programmers, managers, are all working _4 to build the system that'sneedeD． Customers - those who have software that needs to be developed - will learn simple,effective ways to 5_ what they need, to be sure that they are getting what they need,and to steer the project to success.
4、_____

A

together

B

by themselves

C

separately

D

alone

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答案：

A

在极限编程（XP）中，强调团队成员之间的紧密合作和沟通，包括客户、管理者和开发者。为了成功开发软件，这些人员需要一起工作（together）。选项A中的“together”表示“一起”，符合语境。因此，答案为A。