¿Alguien es soltero o sólo yo?

Completa la oración con la voz pasiva con se. used cars for sale. carros usados. (there are no option choices, write the answer in the passive tense, don't use google translate)

¡hable más lentamente, por favor! a. his friend b. his parents c. his teacher d. his classmates

Can you me correct these spanish questions? ? (they are due tomorrow.)