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

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

"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 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 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

"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

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

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

"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

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

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

"to put your feet up" A) to be tired / B) to relax / C) to be clumsy