"to speak of the devil" A) to have an uncomfortable conversation / B) the person who you were talking about unexpectedly arrives / C) to talk about a person you don't like

"to take the plunge" A) to commit to a decision (often one that makes you nervous) / B) to fall down (from a very high place) / C) to make a choice (especially between two similar options)

"to bite the bullet" A) to do something that makes you nervous / B) to do something that makes someone else uncomfortable / C) to make yourself do something difficult or unpleasant

"a piece of cake" to describe something A) very sweet / B) very fun / C) very easy

"to be on the ball" A) to be alert / B) to be on the top / C) to be funny

"to get cold feet" A) suddenly change your emotion eg: happy to sad / B) to suddenly change your mind about something because you are nervous / C) to be anxious about something.

"to cost an arm and a leg" A) something cheap / B) something expensive / C) something of low quality

"to be under the weather" A) to be strong / B) to be sad / C) to be ill

"break a leg!" A) well done! / B) have fun! / C) good luck!

"to give the green light" A) to allow something / B) to prohibit something / C) to like something

"to be left out in the cold" A) to be alone / B) to be excluded / C) to be freezing

"once in a blue moon" A) usually / B) never / C) rarely