All their attempts to rescue the child from the burning building were _____, and he died soon.
—Last night Ted was late for the party again. —You know, ______.
If you _______ this newspaper, you’ll get an extra magazine.
I still find the story Tom told us is very interesting but _____.
_______ the secret of nature, the young scientist has little time for entertainment.
—Was it under the tree ______ you went away talking to a friend? —Sure. But when I got back there, the bike was gone.