I'm afraid this painting is not by Picasso. It's only a copy and so it's _____.
_______ 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 .