Q: Sentence (1) The control condition was inappropriate for the conclusions he wished to draw.
Sentence (2) I turned the controls over to her.. Word: control.
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A: different meanings

Q: Sentence (1) Don't behave like a fool.
Sentence (2) The children must learn to behave.. Word: behave.
==--==
A: different meanings

Q: Sentence (1) He is on the purchasing side of the business.
Sentence (2) Look on the bright side.. Word: side.
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A:
the same meaning