—Must I return the book tomorrow?—No, you ________.You can keep it for three days.
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.
I _____ her not to walk on the thin ice but she would not listen to me.