go to the ... earth: do anything possible

(a)  

... to ground: discovered after a lot of searching

(a)  

fell on ... ground: were ignored

(a)  

pluck a number ...: choose one at random

(a)  

... hot and cold: to sometimes like or be interested in something or someone and sometimes not, so people are confused about how you really feel

(a)  

in ... water: in a difficult situation which is hard to deal with

(a)  

be between the devil and ...: have to choose between 2 equally difficult options

(a)  

spreading like (a)   : going round very quickly

jump/throw someone in ...: do or make someone do sth difficult without giving them any help

(a)  

red ...: official rules and bureaucracy that make it difficult to do sth

(a)  

be in the ...: have a negative amount in your bank balance

(a)  

... blood: belonging to the highest social class

(a)  

workers who do physical work and workers who work in offices

(a)  

in the green ...: countryside around a town or city which is protected from building development

(a)  

a grey ...: sth that is a problem and isn't very clear bc there are no rules

(a)  

a ... hole: sth which has no bottom and everything put into it just disappears

(a)  

to be given the ...: given permission for sth to start

(a)  

a red ...: sth unimportant that takes attention away from the main subject

(a)  

to be a very good gardener

(a)