—Growing population resulted in growing rubbish.—There is ______that rubbish will become the major threat to human beings in future.
The girl __________ to be a good dancer if she is well trained in an art school.
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.