Much time _____ sitting at a desk, office workers are generally troubled by health problems.
—How did you save the drowning girl?—By using a _______.
—What are you going to do this afternoon?—I am going to the cinema with some friends. The film _______ quite early, so we_______ to the bookstore after that.
On hearing the news, the girl rushed out without hesitation, the luggage_______on the floor and _________in the dark.
The old men can hardly imagine that they can live in an age _______ most of the daily things are done on the computers.
The guests are looking forward every moment to _______ to China again.