The first use of atomic weapons was in 1945, and their power ________ increased enormously ever since.
—This is the first time I __________ my first picture with my own hands. —It's time that you __________ a picture for me.
We can't have lunch at the restaurant, because __________.
The suspect's fingerprint printed on the gun was the main __________ against him.
Many children, _________ parents are away working in big cities, are taken good care of in the village.
It must be kept in mind that _______ lifelong study can you survive in the high competitive society.