There must be ____ with the machine.
Before the war broke out, many people ____ possessions they could not take with them.
The young lady prefers dressing up for a party to ____ by others.
The dance performed by the disabled actors is really a hit, but years ago no one ____ they were to achieve such great success.
My mother is always warning me when I go out, “Don’t get off the bus ____ it is stopping.”
It was not until 1920 ___ regular radio broadcasts began.