Question

stem changing verbs e - ie, sa
a que hora el juego de baloncesto?
empieza empiezo empezar empieza

Explanation:

The question is asking "At what time does the basketball game start?" in Spanish. The subject "el juego de baloncesto" (the basketball game) is third - person singular. The correct verb form for "start" (empezar) in the third - person singular present tense is "empieza". "Empiezo" is first - person singular, "empezar" is the infinitive form.

Answer:

empieza