Idioms
knock (something) back/down
to drink something (usually alcohol or medicine)
The medicine tasted terrible but I was able to knock it down.
knock (something) off or knock off (something)
knock about
Knock it off!
knock off work
knock on wood
knock one's head against the wall
knock oneself out (doing something)
knock the props out from under (someone)
know (someone or something) by sight
know (someone or something) like a book
Idioms Quiz
make a great show of (something)
stick out like a sore thumb
down the line
have one's heart go out to (someone)
hard-pressed
no laughing matter
for fear of (something)
to the best of one's knowledge
on the air
go (someone) one better
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My Account / Test History
Invention
Invention : liquid crystal display (lcd)
Year : 1963
Inventor : george heilmeier
Country : us.
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