<span>Here we have two types of snacks typical of Mexico. In Mexico the big snack is called a cake. The cake has round bread1 and many ingredients. The small snack is called a sandwich. In the United States, what is a cake called?</span>
The answer is "an infinitive verb".
Acabar de + infinitive is used to express an action that has ended prior the enunciation of the sentence.
<span>le gustan
it is in past form</span>