<正> A roost is where birds sleep,and they usually return to the samespot each night.When we say the chickens (have) come home to roost.though.we are stating that someone is being rebuked or punished for hispast mistakes or wrongdoings.“When they were young,Ben treatedMark unfairly.Now the chickens have come home to roost because Markhas become famous and he won’t even say hello to Ben.”