En que consiste el sistema de archivo numérico

Ojalá que uds. a clase mañana. a. saben b. vienen c. vengan d. sepan

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?

Answer the following questions using complete spanish sentences. ¿quién ayuda al doctor? ¿qué tomas para sentirte mejor? ¿tienes fiebre ahorita? *note: this is a practice activity. completing this activity will not only prepare you for future tests and assessments but, more importantly, it will enhance your language ability. this activity will not count towards your grade.