Final answer:
The sentence should be completed by using the verb form 'empieza' which means 'begins' in English.
Step-by-step explanation:
The correct verb form to fill in the blank in the sentence is OB. empieza which means 'begins' in English. So, the complete sentence would be 'La clase de inglés empieza a las 10:30 de la mañana.' This sentence is in Spanish and it translates to 'English class begins at 10:30 in the morning.' The verb form 'empieza' agrees with the subject 'La clase de inglés' which is in third-person singular form.
Learn more about Verb forms in Spanish