— Congratulations! You’ve got the first prize in the English Contest.—_____ it be true? It’s unbelievable!

His shoes are muddy. He        be working in an office all day.

When I was a child, I ______ watch TV whenever I wanted to.

—I’m afraid you missed a fantastic lecture yesterday. How come you were absent from it?—If you _______ know, I asked for a day off and visited a relative of mine in hospital.

- _______ I take my umbrella with me? - _______ better to do so. The weather is changeable.