---I have ______ to apologize for the slight damage to your recorder. --- Never mind.
Some people choose jobs for other reasons _____money these days.
_____he had not hurt his leg, John would have won the race.
I won’t call you, ________ something unexpected happens.
The manager suggested an earlier date _______ the meeting.
Leaves are found on all kinds of trees, but they differ greatly ________ size and shape.