迎宾员在确定客人要就餐后，应问清客人是否有预定、（）。
A.客人人数
B.联系电话
C.姓氏
D.是否吸烟
参考答案：A, C, D
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
凌津滩水情测报系统通信采用（）。
A、一频制
B、二频制
C、三频制
D、四频制
