know which is which
суметь различить, отличить одно от другого
Mark's house and Peter's house are so alike that I am often confused and don't know which is which.
Другие идиомы:
- know what's what
- know (something) inside out
- know where (someone) stands on (something)
- know one's ABCs
- know-it-all
- know one's own mind
- know a thing or two (about someone or something)
- know which side one's bread is buttered on
- know the ropes
- know one's place
- know (something) by heart
- know a trick or two
- not know the first thing about something
- know when one is not wanted
- know (something) backwards and forwards