Fill in the blank with the most appropriate idiom:
Despite numerous setbacks, she remained optimistic and continued to ______.
Show answer & explanation
Correct answer: B
Explanation
The idiom 'keep her nose to the grindstone' means to work hard and continuously, which aligns with the context of remaining optimistic and continuing despite numerous setbacks.
The other options do not fit:
'Turn over a new leaf' means to change one's behavior for the better.
'Throw caution to the wind' means to act recklessly.
'Pull the plug' means to stop something from happening or continuing.