The doctors are doing all that they _____, but the old man is still not breathing properly.
Not far from the club there was a garden, ______ owner was seated in an armchair there playing chess with some friends.
—How did you find him out? —I ______ his name by chance on the list.
If you ______ talk about it with me, please wait till I finish my work at hand.
Because they usually receive the same score in the exams, there’s often disagreement as to ______ is the better student, John or Mary.
Some of the drivers were ______ by the police because of their good behavior in the traffic accident.