Would you use "ser" or "estar" to tell time?

What is agudas & llanas & esdrújulas & sobresdrújulas

Hola, mario: yo (1) (estar) en la universidad. la clase de anatomía (2) (ser) de cinco a siete. mi hermano y su esposa (3) (venir) a cenar esta noche. a las siete (yo) (4) (blank) (correr) al supermercado (grocery store). tú (5) (blank) (tener) que regresar a casa antes de las siete. hasta pronto. gracias, valeria

You will have one week to complete this assignment. when you are ready to submit it, go to the "explore submission" link located in your calendar one week from today. research a recent event in an english newspaper or magazine. then research that same event in a spanish newspaper of magazine. (online resources are fine.) write 1-2 paragraphs (8-10 sentences total) in spanish discussing the event seen through both viewpoints. what similarities are there in how the information is presented? what differences are there? what did you learn about the general viewpoints of both cultures? you will be graded on (1) appropriateness of response, (2) use of spanish, and (3) overall quality of your response. (20 points)