To say that something is in front of something else, we would use de . answer for blank 1:

(i put) la carta dentro de uno de estos.

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?

Which verb form correctly completes this sentence? anteayer, yo un retrato de mi mamá. a. pintó b. pinté c. pintaste d. pintaron