21.
To be a good Samaritan

22.
To have one's heart in one's boots

23.
Pell-mell

24.
To hold a brief for

25.
To take a leaf out of somebody's book

26.
To strike one's colours

27.
To put one on one's mettle

28.
To hold somebody to ransom

29.
To set the thames on fire

30.
To cry wolf

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