the hotel, an old man gives him a magic map. A. In B. At C. On
-----Could you tell me how long ________________?------ About three days.
I don't know when he . When he , I'll let you know.
—I would like you to talk about the Great Wall.—I’m sorry, but ________ Jack ________ I have been there.
A report on history in our school next month.
Is this the factory __________ you visited the other day?