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optical illusion

n.
1.an optical phenomenon that results in a false or deceptive visual impression

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    Idiom of the Day

    get rid of (something)
    to give or throw something away, to sell or destroy something, to make a cold or fever disappear
    I bought a new television set so now I want to get rid of my old one.



    1.
    This room would look much better (a) / if you put a fumiture (b) / in that corner. (c) /No error (d)

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