Englishfor English speakers
investigation
Noun
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An investigation is a careful look at a crime, problem, etc. to find the truth or a solution.
Researchers were conducting further investigations into the connection between smoking and lung disease.
The cause of the fire is currently under investigation.
hole
Noun
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A hole is an empty space in an object or material.
He fell into the water through a hole in the ice.
They dug a hole in the ground for the tree.
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In golf, a hole is the place you tried to hit the ball into.
It took four shots to get the ball in the hole.