What should one do？

confuse sth.with sth.else

nine day's wonder(be a nine days' wonder)

become one

come safely out of danger

lead the public opinion astray

White hair and a youthful face

understand the thorough meaning suddenly

be brave all through(be every inch a hero)

vivid description

evil associates

astounding; appalling

be black-and-white

one's contributions in work

stand out in the crowd

almost swooning with fright

add a word or two to clinch the point

pester somebody endlessly(haross somebody with unreasonable demands)

brief glow of health before passing away

Out of the mouth comes evil.