chip in (gambling), help by donating money or time, get a second wind (sailing), have a burst of energy after tiring, keep one's head above water (swimming), try not to fall behind in work or other duties, no sweat (any sport), no problem, shot in the dark (hunting), a guess, skate on thin ice (skating), do something risky, take a chance, win hands down (gambling), easy victory, neck and neck (horse racing) , to be in a close tie with someone.

Task 4

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