I might be working with an unknown person before but have to work together, it allows us to add new friends, and have built a good relationship with people.
I might be working with people who were not previously known. But after working together we can make new friends and establish good relationships with others.
I may be able to work with people you don"t know before. But after working together can we make new friends, add, and has established good relations with คนอื่นด้วย.