It's my pleasure to work with you. 或者It's been a pleasure working with you. 或者 It's a great pleasure to have the opportunity to work with you. (很高兴有这个机会和你合作)
前往不要用cooperate！！！ 那个更是“配合”的意思，有点不得已的感觉，而不是合作。很高兴和你合作就是It's my pleasure to work with you. 或者It's been a pleasure working with you.或者 It's a great pleasure to have the opportunity to work with you. (很高兴有这个机会和你合作)
