He came into the classroom_________.
I wish to thank your student Tom, without _______ rescue couldn’t be offered to my drowning boy so soon.
He was in hospital for six months. He felt as if he was ______ from the outside world.
We must accept the possibility ________ one, although working hard, may fail to reach his goal.
---- Could you be so kind as to close the window?----- _______.
"Genius" is a complicated concept, _ _ many different factors.