1] alejandro’s guidance counselor is him plan his schedule for next year. [2] she suggests that he take ap chemistry and ap french to improve his chances of getting into college. [3] neither he nor his parents thinks he’ll have time to do the work for both courses. [4] alejandro plans to wait until the week before school starts to decide.

which sentence has a subject-verb agreement error?
sentence 1
sentence 2
sentence 3
sentence 4