to be caught napping, go out on a limb, be out on a limb, to be led astray, to leave well alone, to be a necessary evil, to be safe and sound, have a narrow escape, to do something by the skin of your teeth, rather/ too close for comfort, cut things fine, something sets alarm bells ringing, take your life in(to) your hands, your life is in someone's hands, hanging by a thread, on a knife-edge

Unit 17

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