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Word Search :
r

n.
1.a unit of radiation exposure
2.(physics) the universal constant in the gas equation: pressure times volume = R times temperature
3.the 18th letter of the Roman alphabet
4.the length of a line segment between the center and circumference of a circle or sphere

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    Idiom of the Day

    behind the times
    old-fashioned
    My aunt is behind the times.



    1.
    Choose an idiom to replace the expression in the brackets:
    It was difficult to work during the (cold period).

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