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Explanation

"Feel good" means experiencing a sense of happiness, well-being, or confidence.

It's often used to describe a positive emotional or physical state.

Explanation

The idiom means accepting a task that is too difficult or too much to handle.

It suggests overestimating one's ability or time.

Explanation

The phrase "Don't break the flow" refers to maintaining momentum or concentration during a task or activity.

It’s commonly used when someone is working smoothly, and an interruption would disturb their progress.

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The idiom "As the crow flies" means in a straight line.

It refers to the most direct route from one place to another, without considering any obstacles.

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Explanation

"Every trick in the book" is an idiom that means to try every possible method, tactic, or strategy to achieve something.

It implies using all one's skills, experience, and resources to accomplish a goal, even if it requires unconventional or creative approaches.

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If you keep your own counsel, you keep quiet about your opinions or intentions.

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"To cast in the teeth" means criticizing or reproaching someone, often harshly or directly. 

Explanation

The idiom "see eye to eye" means to agree with someone.

In the sentence, it implies that students never agree with the examiners.