His father disappeared, ________ two children and never _______ from again.
The need for an operation, especially an immediate operation, almost always comes as a __________ to the patient and his family.
—You __________ part in the party on time. —Sorry, I was delayed by the accident.
__________ puzzles me most is that I don't know __________ the difference between the two lies.
The soup is perfect, and the steak is delicious. I’d like to have such a meal again ________ it costs twice as much.
—Things are getting more expensive now. —It’s ________ that prices will continue to ________.