Chinese building firms are _______ to expand their business abroad, learn the local construction practices and provide their excellent services.
A、doing efforts
B、making efforts
C、doing effect
D、making effect
【正确答案】：B
【题目解析】：【考点点击】本题主要考查的知识点为固定搭配。【要点透析】make efforts to do sth.表示“努力去做某事”。
