The result is a better understanding of the world on all sides, ____ a future world_____ people from all countries are respected and different views and opinions are tolerated.

A．lead to; that

B．leading to; that

C．leading to; where

D．to lead to; in which

发电、供电都是（）的组成部分。

A、电力销售

B、电力供应

C、电力资源

D、电力生产