Which of the following is not a duty performed by a volcanologist? a. looking at changes to the earth due to volcanoes b. creating evacuation plans in case of eruption c. making mathematical models of volcanic processes d. studying lava and volcanic gases

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