题干
When he was unknown ________the young people, he served ________ a singer at a bar.
A：for; for
B：to; as
C：for; to
D：to; to
答案(点此获取答案解析）
B
When he was unknown ________the young people, he served ________ a singer at a bar.
A：for; for
B：to; as
C：for; to
D：to; to
，如果商是三位数，则除数最大是