3句英文任你选

I propose a toast to the health of everyone here and to the success of our negotiation.
我提议，为各位的健康和我们谈判的成功干杯!

I ask you to raise your glasses in a toast to the expansion of the trade between us.
请大家举杯，为我们之间贸易的发展干杯。

I'd like to take the opportunity to propose a toast to the success of the negotiation and to the prosperity of our two companies.
我愿借此机会举杯祝贺我们会谈成功，并祝我们两家公司更加兴旺。

半个句型要记牢

propose a toast to (提议为……干杯)

Tip:

固定用法，to为介词，后面接名词或动名词。propose既可作及物动词又可作不及物动词，可表示"提议，建议，推荐，求(婚)，祝酒"等。