The fire was so strong that the firefighters couldn’t get it under control, so some soldiers were _______ to help put out the fire.
In spite of the thunderstorm, the children slept _____ all night.
They did not find _____ to prepare for the worst conditions they might meet.
The microphone enabled them to keep in touch, in other words, it made it _____ for them to contact each other.
She is making herself ill with _____ over her son's future.
When products made in factories _____, they are thrown away as garbage.