01 / 3 · BBC Learning English
The idiom 'cross the line' means to start behaving in an unacceptable way.
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Spoken in 3 clips from 3 channels · B1–C1Share
Iran's plan, a form of international extortion, is unacceptable.
Governor Mike Braun has called for an investigation into the utility's response to the outages and says the city's mayor says the pace of restoration has been unacceptable.
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