Debo ________ esta noche. Tengo mucha tarea.A.estarB.estudioC.estudiandoD.estudiar

The correct option to fill in the blank is D. estudiar.

Explanation:

In the sentence "Debo ________ esta noche. Tengo mucha tarea," the verb must be in its infinitive form to express the obligation (debido to "debo"). The phrase translates to "I must ________ tonight. I have a lot of homework."

• A. estar - means "to be" and does not fit contextually.
• B. estudio - means "I study" which is not applicable here.
• C. estudiando - means "studying" but is not in the correct infinitive form.
• D. estudiar - means "to study," which is the correct infinitive form.

Final Answer:

Debo estudiar esta noche.