The old man was found _______ on the floor _______.
_______ their service, the workers of the hotel are active in learning English.
It was about 600 years ago _____ the first clock with a face and an hour hand was made .
—Which of these two electronic dictionaries do you like better ? — _____ . They are both expensive and of little use .
The weather turned out to be very good , _____ was more than we could expect .
What you should remember is that we should always keep ____ in an emergency .