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What does 'Burn the midnight oil' mean?

To be careless in work.

To eat a late-night snack.

To work late into the night.

To rest after a long day.

Which of the following means 'To be extremely happy'?

In hot water.

On cloud nine.

Under the weather.

Cry over spilled milk.

What does 'Cost an arm and a leg' mean?

To give up something precious.

To feel pain in your limbs.

To lose something valuable.

To be very expensive.

Artificial intelligence is great, take it with a pinch of salt.

What does it mean?

Take some salt.

Trust it completely.

Be cautious about the information.

Ignore the advice.

'I will make it at the exams, come rain or shine.' What does it mean?

I will be prepared no matter the weather.

No matter what.

No challenges will affect me.

I will succeed easily.