Question

if you want to sacar una buena nota, what do you need to do? estudiar no prestar atención enseñar hablar

Explanation:

The question asks what one needs to do to get a good grade. Studying ('estudiar') is the logical action for achieving a good grade. Not paying attention ('no prestar atención'), teaching ('enseñar'), and talking ('hablar') are not the main actions to get a good grade.

Answer:

estudiar