下列环境价值评估方法属于反向评估法的是( )。
A．机会成本法
B．隐含价格法
C．调查评价法
D．成果参照法
参考答案：A
A. had discovered B. had been discovered C. has discovered D. has been discovered
Why ____________ I drive so many miles away for a supper when I can easily have it at one of the restaurants nearby?
A．might
B．could
C．would
D．must
