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Start learning 50% faster. Sign in nowThe idiom burned the midnight oil means to work hard or stay up late to complete a task. It fits the context of someone making every effort to finish a project.
Option 2 ("bit the bullet") means to face something difficult, but it doesn't fit the context here.
Option 3 ("turned the tables") means to reverse a situation.
Option 4 ("jumped the gun") means to start something prematurely.