Verb conjugation of "cooperate" in English

I wanted to tell you that we have uploaded a successful version (with Peter). In Annex I send the profile. It is very similar to the last version, just a few words less in each lesson.
The snow can be compared with white veil. Here in Davos, there is lots of new snow, so fresh and powdery snow, which is great for skiing. One needs to be careful from unexpected avalanches.
Thank you for your kind message. I have not done anything for my Spanish because I have too much work at my job. I might write you a letter, but I'm so busy at work that I can't afford other hobbies.