1、—Is Miss Li in the office?
—No,she _______ the classroom.
2、—Have you had your lunch _______?
—Yes,I have _______ had it.
3、—How long may I _______ your MP4 player?
—At most four days.
4、I'll come to see you again _______ a week.
You are supposed to
(关掉)your mobile phones when having meetings.
I'm sorry I couldn't
Would you like to
(与……聊天)others when you travel by train?
Could you please
Has the camera been