Air pollution is getting more and more serious, so we must take action it is too late.
—Hold the ladder for me! —That’s_________.
The president stood by a window inside the room, ____, looking over the square.
As time went by, the plan stuck ____ fairly practical.
It was believed that things would get worse, but ____ it is they are getting better.
The students spent as much time getting trained as they ____ studying.