Idiom
For each of the following sentences four alternatives are given. You are required to choose the correct meaning of the idiom or phrase given or underlined in the sentence. I am afraid he is burning the candle at both ends.

working at night also
working hard
putting in sustained efforts
overtaxing his energies

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Idiom
To throw up the sponge

To maintain grit and enthusiasm until the end
To become utterly disappointed
To surrender or give up a contest
To offer a challenge

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