單項填空Myfather

問題詳情：

 單項填空

My father ___________ a doctor, but now he is a writer.

A. was used to be   B. used to be

C. is used to be     D. was used to being

【回答】

B   used to be a doctor曾經是一名醫生。

知識點：動詞和動詞短語

題型：選擇題