New technologies have made ____ possible to turn out new products faster and at a lower cost.

Do you prefer_____when your boss takes an interest in your personal life?

Of all the books on the desk, ________ is of any use for our safety.

For quite ________ students, their teacher's advice is more important than ________ of their parents.

Professor Zhang handed out the textbooks to all the students,except       who had already taken them.