The professor has written another book ____ of great importance to computer science.
By all _______, you must try every _______ to help him.
“Why couldn’t they meet us at five o’clock?” “Because they were delayed by ________.”
Her father works as a ______ in a hotel and her mother a ______ in a private company.
—Paul has gone abroad to try his luck. —In my _______, his decision is not wise.
I am sure David will be able to find the library-he has a pretty good___ of direction.