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

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

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

"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

"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

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

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