Peter ________ at this job since he graduated from college.
Paper money was in___________use in China when Marco Polo visited the country in __________thirteenth century.
Most animals have little connection with_______animals of________different kind unless they kill them for food.
The warmth of _____sweater will of course be determined by the sort of ____wool used.
I keep medicines on the top shelf, out of the children’s _______.
The journey around the world took the old sailor nine moths, ______the sailing time was 226 days.