—Isyourmotherstillateacher?—

问题详情：

 — 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

【回答】

D。used to be表示“曾经是……”，与现在有对比之意。to后的be要保留。

知识点：交际用语

题型：选择题