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cooperate
mastery UK /kəʊˈɒp.ə.ɹeɪt/ US /koʊˈɑ.pəˌɹeɪt/verb
card 1 of 10 · fill in the blank
The witness refused to _____ with the authorities, hindering the investigation.
card 1 of 10 · fill in the blank
The witness refused to _____ with the authorities, hindering the investigation.