Idioms
to burn the midnight oil
work very late
to smell a rat
understand that something is wrong
it`s raining cats and dogs
it`s raining heavily
to cost an arm and a leg
to be extremely expensive
to burn bridges
destroy relationship
it`s a piece of cake
it`s very easy
cat got your tongue?
speak of the devil
to discuss somebody who is walking by
(not) my cup of tea
(not) interested in
break a leg!
good luck!