.--Have you ________ to Shanghai?--Yes, I___________ there to see my sister last year. She has ____________ Pudong for 2 years.
My father is a doctor.He works _________.
John, as well as his classmate, ______excited ______so many stars yesterday.
The boy is lost. The police ______ him.
He listened carefully, but heard ______.
This bag isn't mine. It's ______.