It’s difficult to calculate its price would be if the museum wanted to sell the ancient vase.
—Shall we go out for dinner tonight? —______.
Why are you so anxious? It isn’t your problem ______.
Running a company is not ______ a matter of hiring people — they also need to be trained.
Everything was perfect for the picnic ______ the weather.
Don’t promise anything ______ you are one hundred percent sure.