问题补充：
, she is quite modest.
A. As she is an experienced teacher
B. An experienced teacher as she is
C. Experienced teacher as she is
D. Experienced teacher although she is
答案：
A. As she is an experienced teacher
B. An experienced teacher as she is
(答案→)C. Experienced teacher as she is
D. Experienced teacher although she is
解析：考查让步和倒装。句意：尽管是一位很有经验的教师，但是她非常谦虚。as引导让步状语从句时，常将表语、动词、名词或副词提到句首，构成倒装，把名词提到句首时，必须省略冠词。故选C。
