问题：
Could you tell me ?
[ ]
A. how long has she teached here
B. how long she has teached here
C. how long she has taught here
D. how long did she teach here
Could you tell me ?
B. how long she has teached here
C. how long she has taught here
D. how long did she teach here
[ ]
A. how long has she teached here B. how long she has teached here
C. how long she has taught here
D. how long did she teach here
参考答案：