问题
选择题
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
答案
答案: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。