Fill each gap with the most appropriate option from the list option from the list provided.
They had to …… the generator when the electricity failed.
- light up
-
fall back on
- switch on
- resort to
The correct answer is: B
Explanation
To "fall back on" something means to use something as a last option when other plans or resources have failed or are unavailable. It means that something is already in place or available as a backup.