There are _____________ doctors and nurses in that hospital.
Peter, _____ do you visit your grandparents?—Twice a month.[ ]
I’m afraid I can do nothing about it. All that can be done ____.
Everyone had an application form in his hand, but no one knew which office ___.
When will Han Han’s new book ________? —Sorry, I don’t know. I’m looking forward to his new book, too.