Choose the correct option to complete the sentence.

Context: Your roommate left a note on the fridge this morning.

Please remember ___ the electricity bill today — it's due at midnight!

The correct answer is to pay.

Remember + to-infinitive means "don't forget to do something" (a future task). The bill hasn't been paid yet, so this is a reminder about a duty. "Remember paying" would mean recalling a past payment you already made.