When asked to explain _____ he did to make his students so fascinated with his lessons, the teacher paused and thought deeply.
——My cat’s really fat. ——You____________have given her so much food.
Thank you for all your hard work last week. I don’t think we ____ it without you.
_______ he had not hurt his leg, John would have won the race.
If it were not for the fact that she_______sing, I would invite her to the party.
__________ fired, your health care and other benefits will not be immediately cut off.