政策主体与客体呈现周期性更迭变化，这种政策周期应属于（）。
A.阶段性周期
B.功能性周期
C.反复性周期
D.结构性周期
参考答案：C
根据《环境影响评价技术导则-总纲》，建设项目环境影响预测与评价时，对于环境质量不符合环境功能要求的，应结合当地（）进行环境质量变化预测。
A.总量控制指标
B.环境整治计划
C.环境功能区划
D.城市总体规划
— Bob! How is your project? I heard you started it last Friday, right?
— Oh! I_____ for it. But I haven't decided when to do it. [ ]
A. have prepared
B. had prepared
C. have been preparing
D. was preparing
