"as clear as mud" A) something brown / B) something confusing / C) something obvious

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

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

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

"to skate on thin ice" A) to be in a risky situation / B) to do something challenging / C) to not like something you have to do

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

"to ring a bell" A) something sounds familiar / B) to get attention / C) something that makes a lot of noise

"to pull someone's leg" A) to make someone uncomfortable or anxious / B) to fool or joke someone / C) to make someone happy about something

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

"to beat around the bush" A) to avoid talking about something / B) to take a long time do something / C) to show disagreement about 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