—Why do you look so upset, Linda?—There are so many troublesome problems____.
_____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.
I have offered to point the house _____a week’s accommodation.