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association
mastery UK /əˌsəʊʃiˈeɪʃn̩/ US /əˌsoʊʃiˈeɪʃən/noun
card 1 of 10 · preposition
The study found an association _____ regular exercise and better sleep quality.
card 1 of 10 · preposition
The study found an association _____ regular exercise and better sleep quality.