—You should ________ your son. He works harder than before.—Thanks, I will.
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?
-----What’s Mary going to do this coming weekend? ----- I’m not sure. She ____________ go to the country to see her aunt.