the standard of living for 3 billion people will create massive opportunities, XiJinping said at the fifth BRICS summit , and he called for major cooperation projects.
A. Improve
B. Improved
C. Improves
D. Improving
网友回答
A. Improve
B. Improved
C. Improves
(答案→)D. Improving
解析：句意：改善30亿人们的生活水平会创造出很多的机会，习近平在第五届亚洲金砖峰会上说，并且他号召广泛的合作项目。此处improve和XiJinping是主动关系，故用现在分词作状语。选D。