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mastery UK /fɔːˈmeɪʃ(ə)n/ US /fɔɹˈmeɪʃ(ə)n/noun
card 1 of 10 · fill in the blank
The geese flew in _____ as they migrated south for the winter.
card 1 of 10 · fill in the blank
The geese flew in _____ as they migrated south for the winter.