—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.
At the foot of the mountain ________, which caught my eye.
Everyone was silent as the organizer ________ the result of the speech competition.
After a few courses on painting, Helen said she would ________ oil painting in her spare time.
Most people are familiar with the idea that all matter in the universe ________ atoms.
________, Nathan gave back the enormous amount of money he found.