25. It is only after my father was long gone _____ understand his deep love for me.
People say that Vancouver is Canada’s most beautiful city, ______by mountains and the Pacific Ocean.
—Obviously, the boss looks happy again, doesn’t he?—Yes. It’s said that he has ______ the difficult problem.
A concert will be held in our city _____ the great musician.
We must do whatever we can _____ the river _____ any more.
People who want to cross Canada in less than five days forget the fact _____ Canada is 5,500 kilometers from coast to coast.