I ____my CD here and there, but I still can’t find it.
--How does Jack usually go to school?---He _____________ride a bike, but now he _____________there to lose weight.
-----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.