It makes good sense to buy a large packet because ________ will work out cheaper in the end.
-Do you mind _____alone at home? -No, but I want a good book_______.
The headmaster wants to have the opening speech ________ by our math teacher next month.
It was ________ the trouble to explain a job fully to new employees.
He argued _______ smoking, and insisted that it was ________ argument that smoking was harmful to health.
-----Poor Steve! I could hardly recognize him just now! ------_______________. He has changed so much.