Question

— Is your mother still a teacher?
— ______.

A．Yes, she was	B．She didn’t use to
C．No, but she used to	D．No, but she used to be

Answer 1

D

選D。used to be表示“曾經(jīng)是……”，與現(xiàn)在有對比之意。to后的be要保留。