You can go out, ______ you promise to be back before 10 o’clock.
Mr. Smith suggested the problem worth paying attention ______ at the meeting.
Don’t hesitate ______me if you have any questions.
—The English exam is not difficult, is it? —______. Even Tom ______ to the top students failed in it.
----Go for a picnic this weekend, OK? ---- ______. I love getting close to nature.
The villagers, _________ had been damaged by the flood, were given help by the Red Cross.