Whenever I think of my childhood, I’ll always feel that the period of free time seem to have passed ________

I’m afraid I ______ return the book to you before Friday. — Take your time.

I ________you yesterday afternoon，but you ________at home.

The company used 50 percent of the raw materials, the rest of which __________ sent to other cities to help the factories there.

Things are getting even worse now without Jackson.—It’s certain that he will ______ at the football field.