Answer:
<u>Visité</u> al mostrador de la aerolínea. <u>Mostré</u> el pasaporte. <u>Dejé</u> las maletas, y <u>recibí</u> la tarjeta de embarque.
Explanation:
The sentence is in the singular, because it's the action that a person is taking.
Greetings.
I talk to Sergio because he's so unfriendly.
