单项选择题
Excuse me, when is the next flight from London due to arrive? （）
A.In half an hour. B.An hour before. C.Until the next one. D.Before another one.
单项选择题 May I give you a hand?（）
单项选择题 Would you mind if I open the window for a better view? （）
单项选择题 Linda, can you give me a lift after work? （）
