Complete the friend's polite refusal of a snack. Select the grammatically correct word to fill in the blank.

"No thank you, I don't want any pizza. I have ___ eaten a huge burger!"

The correct answer is already.

We use already to say that something happened sooner than expected. In this case, the speaker's stomach is full because they ate a burger before the pizza was even offered! It usually goes between the helping verb (have) and the main verb (eaten).