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. He has built a big business empire by his sharp practices.

extreme hard work
dishonest dealings
sharp intelligence
keen business skills

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Idiom
To throw up the sponge

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

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