He an important part in putting out the fire.
She has set a new record, that is, the sales of her latest book ___50 million.
The first use of atomic weapons was in 1945, and their power ____increased enormously ever since.
–Have you heard the latest news?-No, what ____?
The father as well as his three children ___skating on the frozen river every Sunday afternoon in winter.
Not Tom, but I ___to blame for the failure.