The old couple who _______ in the deserted house for ten years have been settled in a nursing home now.

 After the terrorist attack last month, anyone at the airport       heavy bags, bottles of liquid, or whatever, could be stopped and questioned by the police.

— You look tired.— Yes. I ___ non-stop until 8 o’clock.

If it ______tomorrow, we’d stay at home.

Smith ______ a book about China last year, but I don't know whether he has finished it.