这项发明对道路安全做出了重大贡献。

This invention made a major ___contribution to road safety.

她在今天的会议上没做出多大贡献，是吗？

She didn't make much of a ___contribution at today's meeting, did she?

我愿意为俱乐部做出重要贡献。

I am willing to make a significant ___contribution to the club.