Final answer:
The Spanish word that completes the sentence is 'receta', meaning 'prescription'.
Step-by-step explanation:
The Spanish word that best completes the sentence 'es lo que recibes del doctor' is receta, which means prescription in English. The sentence translates to 'it is what you receive from the doctor.' When you go to the doctor, they may give you a prescription to fill at the pharmacy.
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