Write one use of trihydric alchohol​

Does anyone know what the answer is

Use your knowledge of the imperfect preterit, present, and future tenses to write a post card to a friend in colombia (remember to use all your skills in the three tenses). tell your friend about what you did last summer, what you are doing today and the things you plan to do next fall.

Which pair of features is relevant when buying a pc? a. memoria ram y servicio de mensajes escritos b. tiempo de duración del contrato y memoria del disco duro c. memoria ram y precio d. ancho de banda y memoria ram