Saving and recycling are long-term projects determination matters a great deal.
A. that
B. which
C. whose
D. where
网友回答
A. that
B. which
C. whose
(答案→)D. where
解析：考查定语从句。定语从句Where determination matters a great deal修饰先行词project.因为这个定语从句的结构很完整，所以使用关系副词，故答案为D。