Please help will mark as brainlest

Okay so i'm taking an online spanish course (penn foster), and in the study guide, you have to create a bunch of sentences with words you've learned so far. translating, reading, and those kinds of things are fairly easy, but when it comes to making my own sentences, my brain just kinda waltz's away. anyone got any tips?

¿cómo se llaman las dos atracciones más famosas de piñones? isla de pascua y archipiélago puerto peñasco y playas negras isla verde y condado isla tortuga y el morro.

Carlos estudiando en la biblioteca mientras yo estaba en el concietro.