Q: Sentence (1) As they say in the trade.
Sentence (2) They are accused of conspiring to constrain trade.. Word: trade.
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A: different meanings

Q: Sentence (1) Shop til you drop.
Sentence (2) A single shot was fired and the bird dropped from the sky.. Word: drop.
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A: the same meaning

Q: Sentence (1) Use the plastic bags to store the food.
Sentence (2) We only use Spanish at home.. Word: use.
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A:
the same meaning