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Discipline is $on\, the\, wane$ in schools and colleges these days.

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$I$ did not mind what he was saying,he was only $talking\ through\ his\ hat$.

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It is no longer easy to $strike\ gold$ in Shakespeare's research since much work has already been done on him.

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This regular absenteeism is a $bad\, business$ since no work is being completed.

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My car $broke\, down$ on the way to the railway station.

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The robber $took\, to\, his\, heels$ when the police arrived.