171. We'll hold a sports meet in our school if it __________ next weekend.
–Is he coming? --I’m not sure. He may be late or, ________, he may not come at all.
Lisa may be too busy to attend your party but she will try to __________ something out.
It was a pity that the great writer died _________ his work unfinished.
The teacher, with 6 girls and 8 boys of her class, _________ visiting a museum when the earthquake struck.
–---You look so tired. Why not have a rest? -----_________.