I know that it will be difficult to pick him out in such a crowd, but if you ________ happen to see him, give him this packet.
I remember _____ someone ____ the umbrella away.
The noise of the desks _____ could be heard in the next classroom.
The old man didn’t know whether to sell the car or____ .
Mr. Brown said that his car needed
Tom had no choice but _____ the classroom with his classmates.