________leaves the room last ought to turn off the lights.
—You could always put the decision off a little bit longer.—_____ If I leave it much longer I might miss my chance.
To learn to swim well, ___________.
The next thing he saw was smoke ______ from behind the house.
They began to think about what use could be ______ such materials.
Tom ______ close the window when his attention was caught by a bird.