i have not gone to school for 2 days because the teacher (is /was)? tlg jawab sama penjelasannya y

klo menurut saya jawabannya i have not gone to school for 2 days because the teacher WAS. kenapa was ? karena kejadiannya sudah berlalu jadi pakai was atau were tapi karena pada teks ditanya teacher (1orang) jadi pake was