The policemen had no ______ in finding the knife that the murderer had thrown.
—Which one can I take? —-You can take__________ of them; I'll keep none.
The question came up at the meeting____________ we had enough money for our research.
Mr. Smith sold that magnificent cottage of his on the sea _____2,000,000 dollars.
Shortly after the accident, two___________ police were sent to the spot to keep order.
___________lessons were not difficult.