show ones true colours	reveal ones character
lost cause	hopeless situation or case
chair a meeting	preside a meeting
off colour	slighty unwell
have the cheek	dare to complain
get a bit hot under collar	get angry or upset
keep ones chin up	not to be discouraged
with flying colours	with great success
get a problem off ones chest	confide in sb
different as chalk and cheese	very different
call sb name	insult sb
a close shave	narrow escape
play ones cards right	act cleverly
call at	to visit briefly
call back	to ask to return
call for	to require
call off	to cancel
call in	to consult
call up	to conscript
call out	to cause one to go on strike
clear off	to run away
clear out	to get rid of unwanted things
clear up	to brighten up
clear away	to remove
clear of	to find innocent