More highways have been built in China, ________ it much easier for people to travel from one place

to another. [ ]

A. making  

B. made

C. to make  

D. having made

正确理解主体与客体关系的关键在于（）

A、物质第一性的观点

B、意识第一性的观点

C、辩证的观点

D、实践的观点