Fill each gap with the most appropriate option from the list provided.
They had to ...... the generator when the electricity failed.
A
light up
B
fall back on
C
switch on
D
resort to
Verified Correct Answer: B.
Grammar & Contextual 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.
Source: Myschool Past Questions Archive (Record #11545)