题干
–-Do you know about Han Han?
--Yes, he ______ a playful student when he was in secondary school, but now he is one of the most popular writers in China.
--Yes, he ______ a playful student when he was in secondary school, but now he is one of the most popular writers in China.
A：was used to be
B：used to be
C：was used to being
D：was used for
答案(点此获取答案解析）
B
的值为（ ）