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grateful
mastery UK /ˈɡɹeɪtf(ʊ)l/ US /ˈɡɹeɪtf(ə)l/adj
card 1 of 10 · preposition
My parents are very grateful _____ the doctor who saved my life.
card 1 of 10 · preposition
My parents are very grateful _____ the doctor who saved my life.