Is your father a teacher?--well,he---.A.used B.would be C.us

——Is your father a teacher?
-——well,he___.A.used B.would be C.used to be D .were
选C.
句意：
——你父亲现在是老师吗?
——哦,他过去是.
考点：
used to 过去经常（而现在不再）
简析：
He used to be是省略句形式,承接上文省略了表语,补充完整是：
He used to be a teacher.
祝你开心如意!