He made a great to the success of the project.A. contributionB. progressC. distinctionD.

问题补充：

He made a great to the success of the project.

A. contribution

B. progress

C. distinction

D. conclusion

答案：

(答案→)A. contribution

B. progress

C. distinction

D. conclusion

解析：考查名词：A. contribution贡献B. progress进步C. distinction区别D. conclusion结论，句意：他对这个项目的成功做出了很大的贡献。选A。