My brother specializes _____ marine biology and spends his summers studying coral reefs.", in, with, up, at, "Due to a busy schedule, he had to give ___ his membership at the gym.", with, along, more, up, "Successful teamwork requires everyone to work collaboratively and get __ with one another, regardless of their differences.", up, off, along, in, "I prefer working on group projects ___ my close friends.", up, with, at, in

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