●     Extreme Programming (XP) is a discipline of software development with __(71)__ 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 __(72)__ project that needs to deliver quality software rapidly and flexibly.     An XP project needs a __(73)__ customer to provide guidance. Customers, programmers, managers, are all working __(74)__ to build the system that's needeD. Customers - those who have software that needs to be developed-will learn simple, effective ways to __(75)__ what they need, to be sure that they are getting what they need, and to steer the project to success.

（71）A．importance  

B．keys    

C．roles    

D．values

（72）A．small-sized    

B．moderately-sized

C．large-sized    

D．huge-sized

（73）A．part-time    

B．casual    

C．seldom    

D．full-time

（74）A．together    

B．by themselves 

C．separately    

D．alone

（75）A．tell    

B．know    

C．communicate    

D．feedback