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undercover work
n.
1.the act of keeping a secret watch for intelligence purposes
Word of the Day
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undercover operation
undercover agent
undercover
undercoated
undercoat
underclothing
underclothes
underclothed
underclassman
underclass
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undercurrent
undercut
underdevelop
underdeveloped
underdevelopment
underdog
underdone
underdrawers
underdress
underdressed
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clothesbrush
macadamia
work on
nonpolar
confessor
masquer
psychoactive
gastric smear
attested
aegilops triuncalis
Idiom of the Day
all night long
throughout the whole night
We could hear the people next door talking all night long.
1.
I'm afraid it won't be possible to talk to the boss today because he's away ________ business till Tuesday.
a.
off
b.
on
c.
for
d.
to
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World Record Facts
During heart surgery in 1970, a patient with haemophilia (an inherited condition which stops the blood clotting) needed 1,080 litres of blood – nearly 15 baths full – as he kept bleeding.
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