---What he enjoys __________great and interesting. ---Yes, but it’s dangerous.
--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.