Overloaded with work, many doctors now get far less sleep than they _________.
Written in a hurry, ________. How can it be satisfactory?
---Will it be a long time _______ I come for the pictures? ----No. It _______ be ready by 3:00.
Although he _______ the danger to his own health, he found it difficult to quit smoking.
We should _______ whatever is true.
He knows so much about Russia that he's universally acknowledged as a(n) _____ on Russian affairs.