Extreme Programming (XP) is a discipline of software development with(请作答此空)of simplicity, communication, feedback and courage. Successful software development is a team effort - 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 and helps them to succeed together. XP is aimed primarily at object-oriented projects using teams of a dozen or fewer programmers in one location. The principles of XP apply to any( )project that needs to deliver quality software rapidly and flexibly.2011-An XP project needs a( )customer to provide guidance. Customers, programmers, managers, are all working ( )to build the system that's needed．Customers - those who have software that needs to be developed - will learn simple, effective ways to( )what they need, to be sure that they are getting what they need, and to steer the project to success.
A.importance]
B.keys
C.roles
D.values
