Final answer:
The best Spanish word to complete the sentence is 'tomó'. The verb 'tomó' agrees with the subject 'el doctor' and expresses a completed action in the past tense.
Step-by-step explanation:
The best Spanish word to complete the sentence is 'tomó'. Example: El doctor tomó la temperatura del paciente. (The doctor took the patient's temperature). In this context, the verb 'tomó' (took) agrees with the subject 'el doctor' (the doctor) and expresses a completed action in the past tense.
Learn more about Spanish verbs conjugation