Which phrase is grammatically correct?

a. el tercero libro

b. el tercer libro

c. la tercera libro

Which one of the following is a trick used in spanish to identify the right hand? touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase b is your mano derecha. touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase d is your mano izquierda. touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase d is your mano derecha.

El estudio del precio de la papaya corresponde a la parte de la economia llamada

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