What does the museum guide instruct the tourist to remember to do when entering the museum?

El monte aconcagua, en argentina, mode 6,960 metros de altura .la península valdés ,en argentina ,está a 40 metros bajo el nivel del mar.¿cual es la diferencia en metros, de elevación entre estos dos lugares?

Which word or phrase best completes this conversation? eric: qué bueno que vinimos al lago, ahora podemos bañarnos. roberto: ¡oh, no! me he olvidado de traer mi a. chaqueta b. traje de baño c. saco de dormir d. sandalias

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?