The last thirty years _____ the greatest number of laws stopping our rights and progress,until today we have reached a stage ____ we have almost no rights at all.

A．saw;which

B．have seen;that

C．saw;where

D．have seen;where

项目建设的基本框架是在( )阶段确定的。

A．初步可行性研究
B．机会研究
C．项目评估
D．可行性研究