He is known _____ his being on time, so we don’t know the reason ____ his being late this time.
Was it not until you began to work ____ how much time you had wasted?
_____ some teenagers don’t realize is ____ difficult life can be after they get addicted to drugs.
When I got off the crowded bus, I found my pocket _____ and the disk in it with the important documents gone.
The newly discovered star was named _____ a Chinese astronomer ____ honor of his contributions to astronomy.
Hundreds of people gave their lives in _____ of freedom.