_____ when one loses freedom does one know its value.
—May I use your computer?—Sure, _____________
— What’s the matter? — The shoes don’t fit properly. They _____ my feet.
In this experiment, they are woken up several times during the night, and asked to report what they _____.
When he was alive, the old scientist used to say that knowledge ____ from practice and he gained his experience by doing a lot of practical work.
She _____ to the office than she got down to writing the report.