The project is based on an agreement, one of ________ purposes is to ensure that the project can be acplished before the deadlineA.itsB.whichC.whoseD.what
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C解析考查定语从句。本句先行词为agreement，关系代词whose指代the project在定语从句中修饰purpose做定语。句意：这个工程是建立在大家协议的基础之上的，它的目的之一就是保证这这个工程能在最后期限之前完成。