The retired professor, _____ in his new book in the past three years, hasn’t realized the decline in his health.
Doctors believe that only a small number of people ____ of this kind of disease.
Brain told you that there wasn’t anyone in the room at the moment, ______?
The old woman found herself ______ when she left the market.
Public service advertisements are often run _____ free, and are ______ to educate people about health, safety, or any other issue which affects public welfare.
--- Shall I tell John about it? --- No, you _____. I’ve told him already.