Question

fill in the blank with the correct modal verb. select options below to avoid a late fee, you choose... pay the bill before the due date. do are must copyright 2025 learn by doing.

Explanation:

The sentence "To avoid a late fee, you ____ pay the bill before the due date" requires a modal verb that expresses necessity or obligation. "Must" is a modal verb used to indicate that something is necessary or required. "Do" is a main verb or auxiliary verb (not a modal), and "are" is a linking verb (not a modal). So "must" is the correct choice as it conveys the obligation to pay on time to avoid a late fee.

Answer:

must