Question

The project is based on an agreement, one of _____ purposes is to ensure that the project can be completed before the deadline. 

A．whose

B．which

C．its

D．what

Answer 1

A

考查定语从句。应为中间是逗号，可知C排除；what不能引导定语从句，应为空格后还有名词，说明关系词在从句中做定语，故答案为A。