More highways have been built in China it much easier for people to trave form one place t

问题补充：

More highways have been built in China,it much easier for people to trave form one place to another.

A. making

B. made

C. to make

D. having made

答案：

(答案→)A. making

B. made

C. to make

D. having made

解析： 考查非谓语动词作结果状语。To do作结果状语，表出人意料的结果;doing作结果状语，表自然而然，意料之中的结果。句中更多高速被建设，从而使人们出行更方便，是自然而然的结果，所以选A。